-86.49% is the change from 518 to 70
Calculation steps:
[( 70 - 518 ) ÷ 518] x 100 = -86.49%
Formula
Percentage change = [(70 - 518) / 518] x 100
Subtract the new number by the original number
70 - 518 = -448
-448 ÷ 518 = -0.8648648648648649
-0.8648648648648649 x 100 = -86.49%