542.86% is the change from 70 to 450
Calculation steps:
[( 450 - 70 ) ÷ 70] x 100 = 542.86%
Formula
Percentage change = [(450 - 70) / 70] x 100
Subtract the new number by the original number
450 - 70 = 380
380 ÷ 70 = 5.428571428571429
5.428571428571429 x 100 = 542.86%