Ana completed 40 percent of her homework assignment. Her assignment contains 30 math problems. How many problems does Ana still need to complete?

30 ∗ 0.4 = 12 30 − 12 = 18
Since 12 is 40% of 30, she has already completed 12 problems. Subtract that from 30, and you can find that she still needs to do 18 problems .
Using Proportions:
100 40 ​ = 30 x ​ 100 x = 1200 x = 12 30 − 12 = 18

Answered by iloveonedirection | 2024-06-10

Ana has completed 12 math problems out of 30, which means she still needs to complete 18 problems. This is calculated by finding 40% of 30 and subtracting that number from the total. Therefore, she has 18 problems left to do.
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Answered by iloveonedirection | 2024-12-16