55.77% is the change from 312 to 486
Calculation steps:
[( 486 - 312 ) ÷ 312] x 100 = 55.77%
Formula
Percentage change = [(486 - 312) / 312] x 100
Subtract the new number by the original number
486 - 312 = 174
174 ÷ 312 = 0.5576923076923077
0.5576923076923077 x 100 = 55.77%