Question

1. explain how you can use proportional reasoning to determine the whole if you know that 21 is 60% of the whole. lesson 3-2

Explanation:

Step1: Set up proportional equation

Let the whole be $x$. 60% = $\frac{60}{100}$, so $\frac{21}{x} = \frac{60}{100}$.

Step2: Solve for $x$

Cross-multiply: $60x = 21 \times 100$. Calculate $21 \times 100 = 2100$. Then $x = \frac{2100}{60} = 35$.

Answer:

35