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To find \( 155\% \) of 30, you can convert the percentage to a decimal by dividing by 100. So, \( 155\% = 1.55 \). Then, multiply this decimal by 30: \[ 1.55 \times 30 = 46.5 \] Therefore, \( 155\% \) of 30 is \( 46.5 \). Now, picture this in real life: if you were to take a 30-minute workout class and somehow got an extra 55% session added on, you'd be working out for a total of about 46.5 minutes! So, when it comes to workouts (or life!), sometimes you get more than you bargained for. A common mistake when calculating percentages is forgetting to convert the percentage into a decimal before multiplication. Making sure you move that decimal point over two places to the left can save you from ending up with wildly inaccurate results. Always check your work to ensure you're multiplying with the correct figures!