-37.33% is the change from 217 to 136
Calculation steps:
[( 136 - 217 ) ÷ 217] x 100 = -37.33%
Formula
Percentage change = [(136 - 217) / 217] x 100
Subtract the new number by the original number
136 - 217 = -81
-81 ÷ 217 = -0.37327188940092165
-0.37327188940092165 x 100 = -37.33%