77.88% is the change from 312 to 555
Calculation steps:
[( 555 - 312 ) ÷ 312] x 100 = 77.88%
Formula
Percentage change = [(555 - 312) / 312] x 100
Subtract the new number by the original number
555 - 312 = 243
243 ÷ 312 = 0.7788461538461539
0.7788461538461539 x 100 = 77.88%