407.14% is the change from 70 to 355
Calculation steps:
[( 355 - 70 ) ÷ 70] x 100 = 407.14%
Formula
Percentage change = [(355 - 70) / 70] x 100
Subtract the new number by the original number
355 - 70 = 285
285 ÷ 70 = 4.071428571428571
4.071428571428571 x 100 = 407.14%