Question

example 1: find each percent increase or decrease to the nearest percent. 1. from 40 to 59 2. from 85 to 30 3. from 85 to 170 example 2: 4. a population of squirrels rose from 338 to 520 over a period of 3 years. what is the percent increase, to the nearest tenth of a percent?

Explanation:

Step1: Calculate change (40 to 59)

$59 - 40 = 19$

Step2: Find percent increase

$\frac{19}{40} \times 100 = 47.5\%$

Step3: Calculate change (85 to 30)

$85 - 30 = 55$

Step4: Find percent decrease

$\frac{55}{85} \times 100 \approx 64.7\%$

Step5: Calculate change (85 to 170)

$170 - 85 = 85$

Step6: Find percent increase

$\frac{85}{85} \times 100 = 100\%$

Step7: Calculate change (338 to 520)

$520 - 338 = 182$

Step8: Find percent increase

$\frac{182}{338} \times 100 \approx 53.8\%$

Answer:

1. 47.5% increase
2. 64.7% decrease
3. 100% increase
4. 53.8% increase