There were 420 gumballs in a jar but then more were added so that there were 500 gumballs. What is the percent of change? Round to the nearest whole percent.

Question

16%
80%
19%
84%

Answer 1

To find the percent change, you can use the formula:

\[ \text{Percent Change} = \frac{\text{new value} - \text{old value}}{\text{old value}} \times 100 \]

In this case:

• Old value = 420 gumballs
• New value = 500 gumballs

Now, plug these values into the formula:

\[ \text{Percent Change} = \frac{500 - 420}{420} \times 100 = \frac{80}{420} \times 100 \]

Calculate the fraction:

\[ \frac{80}{420} \approx 0.190476 \]

Now, multiply by 100 to convert it to a percentage:

\[ 0.190476 \times 100 \approx 19.05 \]

Rounding to the nearest whole percent gives us:

\[ 19% \]

Thus, the percent of change is 19%.