501.43% is the change from 70 to 421
Calculation steps:
[( 421 - 70 ) ÷ 70] x 100 = 501.43%
Formula
Percentage change = [(421 - 70) / 70] x 100
Subtract the new number by the original number
421 - 70 = 351
351 ÷ 70 = 5.014285714285714
5.014285714285714 x 100 = 501.43%