-90.92% is the change from 815 to 74
Calculation steps:
[( 74 - 815 ) ÷ 815] x 100 = -90.92%
Formula
Percentage change = [(74 - 815) / 815] x 100
Subtract the new number by the original number
74 - 815 = -741
-741 ÷ 815 = -0.90920245398773
-0.90920245398773 x 100 = -90.92%