600% is the change from 49 to 343
Calculation steps:
[( 343 - 49 ) ÷ 49] x 100 = 600%
Formula
Percentage change = [(343 - 49) / 49] x 100
Subtract the new number by the original number
343 - 49 = 294
294 ÷ 49 = 6
6 x 100 = 600%
Example