-36.28% is the change from 215 to 137
Calculation steps:
[( 137 - 215 ) ÷ 215] x 100 = -36.28%
Formula
Percentage change = [(137 - 215) / 215] x 100
Subtract the new number by the original number
137 - 215 = -78
-78 ÷ 215 = -0.3627906976744186
-0.3627906976744186 x 100 = -36.28%