-20.99% is the change from 162 to 128
Calculation steps:
[( 128 - 162 ) ÷ 162] x 100 = -20.99%
Formula
Percentage change = [(128 - 162) / 162] x 100
Subtract the new number by the original number
128 - 162 = -34
-34 ÷ 162 = -0.20987654320987653
-0.20987654320987653 x 100 = -20.99%