66.93% is the change from 505 to 843
Calculation steps:
[( 843 - 505 ) ÷ 505] x 100 = 66.93%
Formula
Percentage change = [(843 - 505) / 505] x 100
Subtract the new number by the original number
843 - 505 = 338
338 ÷ 505 = 0.6693069306930693
0.6693069306930693 x 100 = 66.93%