822.86% is the change from 70 to 646
Calculation steps:
[( 646 - 70 ) ÷ 70] x 100 = 822.86%
Formula
Percentage change = [(646 - 70) / 70] x 100
Subtract the new number by the original number
646 - 70 = 576
576 ÷ 70 = 8.228571428571428
8.228571428571428 x 100 = 822.86%