66.8% is the change from 506 to 844
Calculation steps:
[( 844 - 506 ) ÷ 506] x 100 = 66.8%
Formula
Percentage change = [(844 - 506) / 506] x 100
Subtract the new number by the original number
844 - 506 = 338
338 ÷ 506 = 0.6679841897233202
0.6679841897233202 x 100 = 66.8%