45.59% is the change from 680 to 990
Calculation steps:
[( 990 - 680 ) ÷ 680] x 100 = 45.59%
Formula
Percentage change = [(990 - 680) / 680] x 100
Subtract the new number by the original number
990 - 680 = 310
310 ÷ 680 = 0.45588235294117646
0.45588235294117646 x 100 = 45.59%