510% is the change from 70 to 427
Calculation steps:
[( 427 - 70 ) ÷ 70] x 100 = 510%
Formula
Percentage change = [(427 - 70) / 70] x 100
Subtract the new number by the original number
427 - 70 = 357
357 ÷ 70 = 5.1
5.1 x 100 = 510%
Example