-37.79% is the change from 217 to 135
Calculation steps:
[( 135 - 217 ) ÷ 217] x 100 = -37.79%
Formula
Percentage change = [(135 - 217) / 217] x 100
Subtract the new number by the original number
135 - 217 = -82
-82 ÷ 217 = -0.3778801843317972
-0.3778801843317972 x 100 = -37.79%