-15.32% is the change from 992 to 840
Calculation steps:
[( 840 - 992 ) ÷ 992] x 100 = -15.32%
Formula
Percentage change = [(840 - 992) / 992] x 100
Subtract the new number by the original number
840 - 992 = -152
-152 ÷ 992 = -0.1532258064516129
-0.1532258064516129 x 100 = -15.32%