49.25% is the change from 668 to 997
Calculation steps:
[( 997 - 668 ) ÷ 668] x 100 = 49.25%
Formula
Percentage change = [(997 - 668) / 668] x 100
Subtract the new number by the original number
997 - 668 = 329
329 ÷ 668 = 0.49251497005988026
0.49251497005988026 x 100 = 49.25%