550% is the change from 70 to 455
Calculation steps:
[( 455 - 70 ) ÷ 70] x 100 = 550%
Formula
Percentage change = [(455 - 70) / 70] x 100
Subtract the new number by the original number
455 - 70 = 385
385 ÷ 70 = 5.5
5.5 x 100 = 550%
Example