337.5% is the change from 192 to 840
Calculation steps:
[( 840 - 192 ) ÷ 192] x 100 = 337.5%
Formula
Percentage change = [(840 - 192) / 192] x 100
Subtract the new number by the original number
840 - 192 = 648
648 ÷ 192 = 3.375
3.375 x 100 = 337.5%
Example