77.56% is the change from 312 to 554
Calculation steps:
[( 554 - 312 ) ÷ 312] x 100 = 77.56%
Formula
Percentage change = [(554 - 312) / 312] x 100
Subtract the new number by the original number
554 - 312 = 242
242 ÷ 312 = 0.7756410256410257
0.7756410256410257 x 100 = 77.56%