-29.58% is the change from 142 to 100
Calculation steps:
[( 100 - 142 ) ÷ 142] x 100 = -29.58%
Formula
Percentage change = [(100 - 142) / 142] x 100
Subtract the new number by the original number
100 - 142 = -42
-42 ÷ 142 = -0.29577464788732394
-0.29577464788732394 x 100 = -29.58%