420% is the change from 70 to 364
Calculation steps:
[( 364 - 70 ) ÷ 70] x 100 = 420%
Formula
Percentage change = [(364 - 70) / 70] x 100
Subtract the new number by the original number
364 - 70 = 294
294 ÷ 70 = 4.2
4.2 x 100 = 420%
Example