1555% is the change from 40 to 662
Calculation steps:
[( 662 - 40 ) ÷ 40] x 100 = 1555%
Formula
Percentage change = [(662 - 40) / 40] x 100
Subtract the new number by the original number
662 - 40 = 622
622 ÷ 40 = 15.55
15.55 x 100 = 1555%
Example