-73.49% is the change from 215 to 57
Calculation steps:
[( 57 - 215 ) ÷ 215] x 100 = -73.49%
Formula
Percentage change = [(57 - 215) / 215] x 100
Subtract the new number by the original number
57 - 215 = -158
-158 ÷ 215 = -0.7348837209302326
-0.7348837209302326 x 100 = -73.49%