815.71% is the change from 70 to 641
Calculation steps:
[( 641 - 70 ) ÷ 70] x 100 = 815.71%
Formula
Percentage change = [(641 - 70) / 70] x 100
Subtract the new number by the original number
641 - 70 = 571
571 ÷ 70 = 8.157142857142857
8.157142857142857 x 100 = 815.71%