-22.86% is the change from 70 to 54
Calculation steps:
[( 54 - 70 ) ÷ 70] x 100 = -22.86%
Formula
Percentage change = [(54 - 70) / 70] x 100
Subtract the new number by the original number
54 - 70 = -16
-16 ÷ 70 = -0.22857142857142856
-0.22857142857142856 x 100 = -22.86%