62.5% is the change from 312 to 507
Calculation steps:
[( 507 - 312 ) ÷ 312] x 100 = 62.5%
Formula
Percentage change = [(507 - 312) / 312] x 100
Subtract the new number by the original number
507 - 312 = 195
195 ÷ 312 = 0.625
0.625 x 100 = 62.5%
Example