-91.19% is the change from 840 to 74
Calculation steps:
[( 74 - 840 ) ÷ 840] x 100 = -91.19%
Formula
Percentage change = [(74 - 840) / 840] x 100
Subtract the new number by the original number
74 - 840 = -766
-766 ÷ 840 = -0.9119047619047619
-0.9119047619047619 x 100 = -91.19%