-90.41% is the change from 730 to 70
Calculation steps:
[( 70 - 730 ) ÷ 730] x 100 = -90.41%
Formula
Percentage change = [(70 - 730) / 730] x 100
Subtract the new number by the original number
70 - 730 = -660
-660 ÷ 730 = -0.9041095890410958
-0.9041095890410958 x 100 = -90.41%