-78.21% is the change from 156 to 34
Calculation steps:
[( 34 - 156 ) ÷ 156] x 100 = -78.21%
Formula
Percentage change = [(34 - 156) / 156] x 100
Subtract the new number by the original number
34 - 156 = -122
-122 ÷ 156 = -0.782051282051282
-0.782051282051282 x 100 = -78.21%