76.28% is the change from 312 to 550
Calculation steps:
[( 550 - 312 ) ÷ 312] x 100 = 76.28%
Formula
Percentage change = [(550 - 312) / 312] x 100
Subtract the new number by the original number
550 - 312 = 238
238 ÷ 312 = 0.7628205128205128
0.7628205128205128 x 100 = 76.28%