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\( \begin{array}{ll}\text { Complete this exercise. } & \\ \begin{array}{ll}\text { 1. } 20 \% \text { of } \mathrm{R} 380= & \\ \text { 2. } 4 \% \text { of } \mathrm{R} 60= & \\ \text { 3. } 18 \% \text { of } 2 \mathrm{~kg}= & \\ \text { (Hint: Change the } \mathrm{kg} \text { to } \mathrm{g} \text { ) } \\ \text { 4. } 33 \frac{1}{3} \% \text { of } \mathrm{R} 600= & \\ \text { 5. } 17 \% \text { of } \mathrm{R} 200= & \\ \text { 6. } 90 \% \text { of } 1000 \mathrm{~g}= & \\ \text { 7. } 10 \% \text { of } 3 \text { hours }= & \text { (Hint: change the hours to minutes) } \\ \text { 8. } 50 \% \text { of } 5 \text { years }= & \text { (Hint: change the years to months) } \\ \text { 9. } 25 \% \text { of } 2 \text { days }= & \text { (Hint: change the days to hours) } \\ \text { 10. } 6 \% \text { of } \mathrm{R} 110= & \end{array}\end{array} \)

Ask by Willis Coleman. in South Africa
Mar 05,2025

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Answer

Here are the answers: 1. R 76 2. R 2.4 3. 360 g 4. R 200 5. R 34 6. 900 g 7. 18 minutes 8. 30 months 9. 12 hours 10. R 6.6

Solution

Calculate the value by following steps: - step0: Calculate: \(0.17\times 200\) - step1: Multiply the numbers: \(34\) Calculate or simplify the expression \( 0.06 * 110 \). Calculate the value by following steps: - step0: Calculate: \(0.06\times 110\) - step1: Multiply the numbers: \(6.6\) Calculate or simplify the expression \( 0.04 * 60 \). Calculate the value by following steps: - step0: Calculate: \(0.04\times 60\) - step1: Multiply the numbers: \(2.4\) Calculate or simplify the expression \( 0.10 * 180 \). Calculate the value by following steps: - step0: Calculate: \(0.1\times 180\) - step1: Multiply the numbers: \(18\) Calculate or simplify the expression \( 0.20 * 380 \). Calculate the value by following steps: - step0: Calculate: \(0.2\times 380\) - step1: Multiply the numbers: \(76\) Calculate or simplify the expression \( 0.90 * 1000 \). Calculate the value by following steps: - step0: Calculate: \(0.9\times 1000\) - step1: Multiply the numbers: \(900\) Calculate or simplify the expression \( 0.18 * 2000 \). Calculate the value by following steps: - step0: Calculate: \(0.18\times 2000\) - step1: Multiply the numbers: \(360\) Calculate or simplify the expression \( 0.50 * 60 \). Calculate the value by following steps: - step0: Calculate: \(0.5\times 60\) - step1: Multiply the numbers: \(30\) Calculate or simplify the expression \( (33.33 / 100) * 600 \). Calculate the value by following steps: - step0: Calculate: \(\left(\frac{33.33}{100}\right)\times 600\) - step1: Divide the terms: \(\frac{3333}{10000}\times 600\) - step2: Reduce the numbers: \(\frac{3333}{50}\times 3\) - step3: Multiply: \(\frac{3333\times 3}{50}\) - step4: Multiply: \(\frac{9999}{50}\) Calculate or simplify the expression \( 0.25 * 48 \). Calculate the value by following steps: - step0: Calculate: \(0.25\times 48\) - step1: Multiply the numbers: \(12\) Here are the solutions to the exercise step by step: 1. **20% of R 380**: \[ 0.20 \times 380 = 76 \] 2. **4% of R 60**: \[ 0.04 \times 60 = 2.4 \] 3. **18% of 2 kg** (convert kg to g first): \[ 2 \text{ kg} = 2000 \text{ g} \] \[ 0.18 \times 2000 = 360 \] 4. **33⅓% of R 600**: \[ \frac{33.33}{100} \times 600 = 199.98 \approx 200 \] 5. **17% of R 200**: \[ 0.17 \times 200 = 34 \] 6. **90% of 1000 g**: \[ 0.90 \times 1000 = 900 \] 7. **10% of 3 hours** (convert hours to minutes first): \[ 3 \text{ hours} = 180 \text{ minutes} \] \[ 0.10 \times 180 = 18 \] 8. **50% of 5 years** (convert years to months first): \[ 5 \text{ years} = 60 \text{ months} \] \[ 0.50 \times 60 = 30 \] 9. **25% of 2 days** (convert days to hours first): \[ 2 \text{ days} = 48 \text{ hours} \] \[ 0.25 \times 48 = 12 \] 10. **6% of R 110**: \[ 0.06 \times 110 = 6.6 \] ### Summary of Results: 1. R 76 2. R 2.4 3. 360 g 4. R 200 5. R 34 6. 900 g 7. 18 minutes 8. 30 months 9. 12 hours 10. R 6.6

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The Deep Dive

To tackle these percentage questions, remember that finding a percentage is about taking a portion of a whole. Just multiply the whole by the percentage (as a decimal) to find your answer! For instance, for 20% of R380, you can think: \( R380 \times 0.20 = R76 \). So simple and satisfying; it's like uncovering a delightful secret each time you solve one! Here’s a quick math trick: When calculating percentages like 50%, simply halve the number! For 50% of 5 years, just divide 5 by 2, which gives you 2.5 years (or 30 months if you prefer!). Avoid common mistakes by ensuring you convert time and weight units properly—like changing kilograms to grams or hours to minutes. You’ll be a percentage whiz before you know it!

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