136.84% is the change from 342 to 810
Calculation steps:
[( 810 - 342 ) ÷ 342] x 100 = 136.84%
Formula
Percentage change = [(810 - 342) / 342] x 100
Subtract the new number by the original number
810 - 342 = 468
468 ÷ 342 = 1.368421052631579
1.368421052631579 x 100 = 136.84%