-78.87% is the change from 142 to 30
Calculation steps:
[( 30 - 142 ) ÷ 142] x 100 = -78.87%
Formula
Percentage change = [(30 - 142) / 142] x 100
Subtract the new number by the original number
30 - 142 = -112
-112 ÷ 142 = -0.7887323943661971
-0.7887323943661971 x 100 = -78.87%