985% is the change from 40 to 434
Calculation steps:
[( 434 - 40 ) ÷ 40] x 100 = 985%
Formula
Percentage change = [(434 - 40) / 40] x 100
Subtract the new number by the original number
434 - 40 = 394
394 ÷ 40 = 9.85
9.85 x 100 = 985%
Example