630% is the change from 70 to 511
Calculation steps:
[( 511 - 70 ) ÷ 70] x 100 = 630%
Formula
Percentage change = [(511 - 70) / 70] x 100
Subtract the new number by the original number
511 - 70 = 441
441 ÷ 70 = 6.3
6.3 x 100 = 630%
Example