A student has a container with a volume of 1.5 liters. She estimates the volume to be 2.1 liters. By what percent is the student's estimate off? (Round to the nearest percent as needed.)

Answer: 40 percent

Step-by-step explanation: real value = 1.5 liters, estimated value = 2.1 liters.

Percentage student's estimate = (difference in estimate / real value) * 100

Difference in estimate = 2.1-1.5 = 0.6

Real value = 1.5

Percentage student's estimate = (0.6/1.5) * 100 = 0.4*100 = 40 percent