Percent of Change and Error Review

Determine if Percent of Change is a percent of increase or decrease $120 to $135

Determine if Percent of Change is a percent of increase or decrease

70 inches to 45 inches

Find the percent of Change. 25 yards to 30 yards

$$\frac{New\ Amount\ -\ Original\ Amout}{Orginal\ Amount}\ \times\ 100$$  

Find the percent of Change. 125 centimeters to 87.5 centimeters $$\frac{New\ Amount\ -\ Original\ Amout}{Orginal\ Amount}\ \times\ 100$$  

Chris estimates there are 12 students absent.  The actual amount of students absent is 15.  Find the percent error.

$$\frac{Estimate\ -\ Actual\ Amout}{Actual\ Amount}\ \times\ 100$$  

Mr. Smith goes to the hardware store and estimates that he will spend $135.  He actually spends $90.  Find the percent error.

$$\frac{Estimate\ -\ Actual\ Amout}{Actual\ Amount}\ \times\ 100$$