680.47% is the change from 128 to 999
Calculation steps:
[( 999 - 128 ) ÷ 128] x 100 = 680.47%
Formula
Percentage change = [(999 - 128) / 128] x 100
Subtract the new number by the original number
999 - 128 = 871
871 ÷ 128 = 6.8046875
6.8046875 x 100 = 680.47%