142.86% is the change from 336 to 816
Calculation steps:
[( 816 - 336 ) ÷ 336] x 100 = 142.86%
Formula
Percentage change = [(816 - 336) / 336] x 100
Subtract the new number by the original number
816 - 336 = 480
480 ÷ 336 = 1.4285714285714286
1.4285714285714286 x 100 = 142.86%