671.43% is the change from 70 to 540
Calculation steps:
[( 540 - 70 ) ÷ 70] x 100 = 671.43%
Formula
Percentage change = [(540 - 70) / 70] x 100
Subtract the new number by the original number
540 - 70 = 470
470 ÷ 70 = 6.714285714285714
6.714285714285714 x 100 = 671.43%