Lisa finished 21 out of her 30 problems in class. What percent of the math problems did Lisa finish in class?
To find the percentage of math problems Lisa finished in class, you need to divide the number of problems she finished (21) by the total number of problems (30), and then multiply by 100.
Here's how you can calculate it step by step:
Step 1: Divide the number of problems Lisa finished (21) by the total number of problems (30): 21 / 30 = 0.7.
Step 2: Multiply the result by 100 to convert it to a percentage: 0.7 * 100 = 70.
Therefore, Lisa finished 70% of the math problems in class.