-86.19% is the change from 507 to 70
Calculation steps:
[( 70 - 507 ) ÷ 507] x 100 = -86.19%
Formula
Percentage change = [(70 - 507) / 507] x 100
Subtract the new number by the original number
70 - 507 = -437
-437 ÷ 507 = -0.8619329388560157
-0.8619329388560157 x 100 = -86.19%