66.21% is the change from 515 to 856
Calculation steps:
[( 856 - 515 ) ÷ 515] x 100 = 66.21%
Formula
Percentage change = [(856 - 515) / 515] x 100
Subtract the new number by the original number
856 - 515 = 341
341 ÷ 515 = 0.6621359223300971
0.6621359223300971 x 100 = 66.21%