## Elementary Technical Mathematics

The rate is unknown. The base is 7.15, the number following "of". The part is the other number, 3.5. $R=\frac{P}{B}=\frac{3.5}{7.15}=0.4895$ Move the decimal two places to the right convert the decimal to a percent. Round to the nearest tenth. $0.4895\approx49.0\%$