-91.57% is the change from 913 to 77
Calculation steps:
[( 77 - 913 ) ÷ 913] x 100 = -91.57%
Formula
Percentage change = [(77 - 913) / 913] x 100
Subtract the new number by the original number
77 - 913 = -836
-836 ÷ 913 = -0.9156626506024096
-0.9156626506024096 x 100 = -91.57%