540% is the change from 70 to 448
Calculation steps:
[( 448 - 70 ) ÷ 70] x 100 = 540%
Formula
Percentage change = [(448 - 70) / 70] x 100
Subtract the new number by the original number
448 - 70 = 378
378 ÷ 70 = 5.4
5.4 x 100 = 540%
Example