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Question

Find the percent of change in altitude if a weather balloon moves from 100 ft to 103 ft. Describe the percent of change as an increase or decrease. Round to the nearest tenth if necessary.

Answer 1

To find the percent of change in altitude, we can use the formula for percent change:

\[ \text{Percent Change} = \frac{\text{New Value} - \text{Old Value}}{\text{Old Value}} \times 100 \]

In this case, the old value is 100 ft and the new value is 103 ft.

1. Calculate the difference: \[ \text{New Value} - \text{Old Value} = 103 - 100 = 3 \]

2. Divide the difference by the old value: \[ \frac{3}{100} = 0.03 \]

3. Multiply by 100 to get the percent: \[ 0.03 \times 100 = 3 \]

So, the percent of change is \(3%\).

Since the new altitude (103 ft) is greater than the old altitude (100 ft), this is described as an increase.

Thus, the percent of change in altitude is 3% increase.