-40.87% is the change from 115 to 68
Calculation steps:
[( 68 - 115 ) ÷ 115] x 100 = -40.87%
Formula
Percentage change = [(68 - 115) / 115] x 100
Subtract the new number by the original number
68 - 115 = -47
-47 ÷ 115 = -0.40869565217391307
-0.40869565217391307 x 100 = -40.87%