-20.51% is the change from 156 to 124
Calculation steps:
[( 124 - 156 ) ÷ 156] x 100 = -20.51%
Formula
Percentage change = [(124 - 156) / 156] x 100
Subtract the new number by the original number
124 - 156 = -32
-32 ÷ 156 = -0.20512820512820512
-0.20512820512820512 x 100 = -20.51%