684% is the change from 50 to 392
Calculation steps:
[( 392 - 50 ) ÷ 50] x 100 = 684%
Formula
Percentage change = [(392 - 50) / 50] x 100
Subtract the new number by the original number
392 - 50 = 342
342 ÷ 50 = 6.84
6.84 x 100 = 684%
Example