-64.65% is the change from 215 to 76
Calculation steps:
[( 76 - 215 ) ÷ 215] x 100 = -64.65%
Formula
Percentage change = [(76 - 215) / 215] x 100
Subtract the new number by the original number
76 - 215 = -139
-139 ÷ 215 = -0.6465116279069767
-0.6465116279069767 x 100 = -64.65%