55.45% is the change from 312 to 485
Calculation steps:
[( 485 - 312 ) ÷ 312] x 100 = 55.45%
Formula
Percentage change = [(485 - 312) / 312] x 100
Subtract the new number by the original number
485 - 312 = 173
173 ÷ 312 = 0.5544871794871795
0.5544871794871795 x 100 = 55.45%