3700% is the change from 9 to 342
Calculation steps:
[( 342 - 9 ) ÷ 9] x 100 = 3700%
Formula
Percentage change = [(342 - 9) / 9] x 100
Subtract the new number by the original number
342 - 9 = 333
333 ÷ 9 = 37
37 x 100 = 3700%
Example