70.75% is the change from 506 to 864
Calculation steps:
[( 864 - 506 ) ÷ 506] x 100 = 70.75%
Formula
Percentage change = [(864 - 506) / 506] x 100
Subtract the new number by the original number
864 - 506 = 358
358 ÷ 506 = 0.7075098814229249
0.7075098814229249 x 100 = 70.75%