Find the percent increase or decrease.
25. from 20 to 35

To find the percent increase from 20 to 35, you subtract the original number (20) from the new number (35), which gives you a change of 15. Then, divide that change by the original number: 15 ÷ 20 = 0.75. To convert it to a percentage, multiply by 100, resulting in a 75% increase. So, congrats on that impressive growth!

When calculating percentage changes like this, a common mistake is to forget to use the original number as your base. Always remember that the original amount is crucial because it sets the stage for how large the increase or decrease is in relation to where you started. Happy math-ing!