82.14% is the change from 336 to 612
Calculation steps:
[( 612 - 336 ) ÷ 336] x 100 = 82.14%
Formula
Percentage change = [(612 - 336) / 336] x 100
Subtract the new number by the original number
612 - 336 = 276
276 ÷ 336 = 0.8214285714285714
0.8214285714285714 x 100 = 82.14%