-64.29% is the change from 70 to 25
Calculation steps:
[( 25 - 70 ) ÷ 70] x 100 = -64.29%
Formula
Percentage change = [(25 - 70) / 70] x 100
Subtract the new number by the original number
25 - 70 = -45
-45 ÷ 70 = -0.6428571428571429
-0.6428571428571429 x 100 = -64.29%