-28.57% is the change from 217 to 155
Calculation steps:
[( 155 - 217 ) ÷ 217] x 100 = -28.57%
Formula
Percentage change = [(155 - 217) / 217] x 100
Subtract the new number by the original number
155 - 217 = -62
-62 ÷ 217 = -0.2857142857142857
-0.2857142857142857 x 100 = -28.57%