848.57% is the change from 70 to 664
Calculation steps:
[( 664 - 70 ) ÷ 70] x 100 = 848.57%
Formula
Percentage change = [(664 - 70) / 70] x 100
Subtract the new number by the original number
664 - 70 = 594
594 ÷ 70 = 8.485714285714286
8.485714285714286 x 100 = 848.57%