Question

Loretta picks apples for her grandfather to make apple cider. She brings him her cart with 42 apples. Her grandfather smiles at her and say’s, Thank you Loretta. That is 40% of the apples that we need.”

Answer 1

One way of answering this question is to use division and multiplication and logic.
So you know that 42 is 40% of the total, so if you divide that by 4 you get 10.5, 10% of the total.
From there you can multiply it by 10 to get 105, 100%
She need to have a total of 105 apples