81.58% is the change from 505 to 917
Calculation steps:
[( 917 - 505 ) ÷ 505] x 100 = 81.58%
Formula
Percentage change = [(917 - 505) / 505] x 100
Subtract the new number by the original number
917 - 505 = 412
412 ÷ 505 = 0.8158415841584158
0.8158415841584158 x 100 = 81.58%