79.68% is the change from 310 to 557
Calculation steps:
[( 557 - 310 ) ÷ 310] x 100 = 79.68%
Formula
Percentage change = [(557 - 310) / 310] x 100
Subtract the new number by the original number
557 - 310 = 247
247 ÷ 310 = 0.7967741935483871
0.7967741935483871 x 100 = 79.68%