-67.14% is the change from 70 to 23
Calculation steps:
[( 23 - 70 ) ÷ 70] x 100 = -67.14%
Formula
Percentage change = [(23 - 70) / 70] x 100
Subtract the new number by the original number
23 - 70 = -47
-47 ÷ 70 = -0.6714285714285714
-0.6714285714285714 x 100 = -67.14%