-87% is the change from 992 to 129
Calculation steps:
[( 129 - 992 ) ÷ 992] x 100 = -87%
Formula
Percentage change = [(129 - 992) / 992] x 100
Subtract the new number by the original number
129 - 992 = -863
-863 ÷ 992 = -0.8699596774193549
-0.8699596774193549 x 100 = -87%