700% is the change from 42 to 336
Calculation steps:
[( 336 - 42 ) ÷ 42] x 100 = 700%
Formula
Percentage change = [(336 - 42) / 42] x 100
Subtract the new number by the original number
336 - 42 = 294
294 ÷ 42 = 7
7 x 100 = 700%
Example