4.62% is the change from 650 to 680
Calculation steps:
[( 680 - 650 ) ÷ 650] x 100 = 4.62%
Formula
Percentage change = [(680 - 650) / 650] x 100
Subtract the new number by the original number
680 - 650 = 30
30 ÷ 650 = 0.046153846153846156
0.046153846153846156 x 100 = 4.62%