-77.74% is the change from 840 to 187
Calculation steps:
[( 187 - 840 ) ÷ 840] x 100 = -77.74%
Formula
Percentage change = [(187 - 840) / 840] x 100
Subtract the new number by the original number
187 - 840 = -653
-653 ÷ 840 = -0.7773809523809524
-0.7773809523809524 x 100 = -77.74%