51.87% is the change from 507 to 770
Calculation steps:
[( 770 - 507 ) ÷ 507] x 100 = 51.87%
Formula
Percentage change = [(770 - 507) / 507] x 100
Subtract the new number by the original number
770 - 507 = 263
263 ÷ 507 = 0.5187376725838264
0.5187376725838264 x 100 = 51.87%