-78.17% is the change from 142 to 31
Calculation steps:
[( 31 - 142 ) ÷ 142] x 100 = -78.17%
Formula
Percentage change = [(31 - 142) / 142] x 100
Subtract the new number by the original number
31 - 142 = -111
-111 ÷ 142 = -0.7816901408450704
-0.7816901408450704 x 100 = -78.17%