-31.63% is the change from 215 to 147
Calculation steps:
[( 147 - 215 ) ÷ 215] x 100 = -31.63%
Formula
Percentage change = [(147 - 215) / 215] x 100
Subtract the new number by the original number
147 - 215 = -68
-68 ÷ 215 = -0.31627906976744186
-0.31627906976744186 x 100 = -31.63%