644.29% is the change from 70 to 521
Calculation steps:
[( 521 - 70 ) ÷ 70] x 100 = 644.29%
Formula
Percentage change = [(521 - 70) / 70] x 100
Subtract the new number by the original number
521 - 70 = 451
451 ÷ 70 = 6.442857142857143
6.442857142857143 x 100 = 644.29%