Laura checked her outdoor thermometer and noticed that the temperature rose from 31 degrees in the morning to 45 degrees in the afternoon. What is the approximate percent increase for the day so far?
Answer
A
The percent increase is approximately 31%.
B
The percent increase is approximately 45%.
C
The percent increase is approximately 68%.
D
The percent increase is approximately 82%.
Explanation
The temperature increased by 45 − 31 = 14 degrees. Divide the increase by the starting temperature: 14 ÷ 31 × 100 ≈ 45%. So the percent increase is approximately 45%, which is choice B.
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