-20.45% is the change from 88 to 70
Calculation steps:
[( 70 - 88 ) ÷ 88] x 100 = -20.45%
Formula
Percentage change = [(70 - 88) / 88] x 100
Subtract the new number by the original number
70 - 88 = -18
-18 ÷ 88 = -0.20454545454545456
-0.20454545454545456 x 100 = -20.45%