### Instruction: Jimmy notices $7$ oranges weigh the same as $5$ apples.  If Jimmy has $28$ oranges, how many apples would Jimmy need to equal the weight of his $28$ oranges?### Response: To solve this problem, I need to find a way to compare the weight of one orange and one apple.
I know that $7$ oranges weigh the same as $5$ apples, so I can divide both sides by $7$ to get that one orange weighs the same as $\frac{5}{7}$ apples.
Now I can use this ratio to find how many apples would equal the weight of $28$ oranges.
I can multiply both sides by $28$ to get that $28$ oranges weigh the same as $28 \times \frac{5}{7}$ apples.
I can simplify this expression by canceling out the $7$s to get that $28$ oranges weigh the same as $20$ apples.
Therefore, Jimmy would need $20$ apples to equal the weight of his $28$ oranges.