Question

A student has a container with a volume of 1.5 liters. She estimates the volume to be 1.2 liters. By

what percent is the student's estimate off?

Answer 1

The student's estimate is 20% off.

Explanation:

Given that a student has a container with a volume of 1.5 liters, so

• Exact value = 1.5 liters

As the student estimates the volume to be 1.2 liters, so

• Approx value = 1.2 liters

Therefore,

Percentage Error = [ |Approx Value - Exact value| ] / [ | Exact value |] × 100

= | 1.2 - 1.5 | / | 1.5 | × 100

= [ 0.3 / 1.5 ] × 100

= 0.2 × 100

= 20%

Therefore, the student's estimate is 20% off.