68.04% is the change from 510 to 857
Calculation steps:
[( 857 - 510 ) ÷ 510] x 100 = 68.04%
Formula
Percentage change = [(857 - 510) / 510] x 100
Subtract the new number by the original number
857 - 510 = 347
347 ÷ 510 = 0.6803921568627451
0.6803921568627451 x 100 = 68.04%