-30.41% is the change from 217 to 151
Calculation steps:
[( 151 - 217 ) ÷ 217] x 100 = -30.41%
Formula
Percentage change = [(151 - 217) / 217] x 100
Subtract the new number by the original number
151 - 217 = -66
-66 ÷ 217 = -0.30414746543778803
-0.30414746543778803 x 100 = -30.41%