81.41% is the change from 312 to 566
Calculation steps:
[( 566 - 312 ) ÷ 312] x 100 = 81.41%
Formula
Percentage change = [(566 - 312) / 312] x 100
Subtract the new number by the original number
566 - 312 = 254
254 ÷ 312 = 0.8141025641025641
0.8141025641025641 x 100 = 81.41%