-86.33% is the change from 512 to 70
Calculation steps:
[( 70 - 512 ) ÷ 512] x 100 = -86.33%
Formula
Percentage change = [(70 - 512) / 512] x 100
Subtract the new number by the original number
70 - 512 = -442
-442 ÷ 512 = -0.86328125
-0.86328125 x 100 = -86.33%