-7.76% is the change from 992 to 915
Calculation steps:
[( 915 - 992 ) ÷ 992] x 100 = -7.76%
Formula
Percentage change = [(915 - 992) / 992] x 100
Subtract the new number by the original number
915 - 992 = -77
-77 ÷ 992 = -0.07762096774193548
-0.07762096774193548 x 100 = -7.76%