-90.95% is the change from 840 to 76
Calculation steps:
[( 76 - 840 ) ÷ 840] x 100 = -90.95%
Formula
Percentage change = [(76 - 840) / 840] x 100
Subtract the new number by the original number
76 - 840 = -764
-764 ÷ 840 = -0.9095238095238095
-0.9095238095238095 x 100 = -90.95%