67% is the change from 506 to 845
Calculation steps:
[( 845 - 506 ) ÷ 506] x 100 = 67%
Formula
Percentage change = [(845 - 506) / 506] x 100
Subtract the new number by the original number
845 - 506 = 339
339 ÷ 506 = 0.6699604743083004
0.6699604743083004 x 100 = 67%