Measured distance: 84ft

actual distance: 80ft

percent error:?

1. Subtract the actual distance from the measured distance to find the error:

80-84 = - 4 (just ignore the negative sign) so our error is 4

2. Divide error by the actual distance:

4/80 = 0.05

3. Multiply that by 100 to find percent:

.05*100 = 5%

Percentage error is 5%

Per enrage error is 5%