Question

1.
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**.