Question

a factory could make 84 toy robots in one day. they purchased some new equipment, and can now make 105 toy robots in one day. what is the percent change? ?%

Explanation:

Step1: Find the amount of change

The original amount is 84 and the new amount is 105. The change is $105 - 84=21$.

Step2: Calculate the percent - change formula

The percent - change formula is $\text{Percent Change}=\frac{\text{Change}}{\text{Original Amount}}\times100\%$. Substitute the values: $\frac{21}{84}\times100\%$.

Step3: Simplify the fraction and multiply by 100%

$\frac{21}{84}=\frac{1}{4}=0.25$. Then $0.25\times100\% = 25\%$.

Answer:

25%