-95.35% is the change from 215 to 10
Calculation steps:
[( 10 - 215 ) ÷ 215] x 100 = -95.35%
Formula
Percentage change = [(10 - 215) / 215] x 100
Subtract the new number by the original number
10 - 215 = -205
-205 ÷ 215 = -0.9534883720930233
-0.9534883720930233 x 100 = -95.35%
Example