68.5% is the change from 508 to 856
Calculation steps:
[( 856 - 508 ) ÷ 508] x 100 = 68.5%
Formula
Percentage change = [(856 - 508) / 508] x 100
Subtract the new number by the original number
856 - 508 = 348
348 ÷ 508 = 0.6850393700787402
0.6850393700787402 x 100 = 68.5%