690.7% is the change from 86 to 680
Calculation steps:
[( 680 - 86 ) ÷ 86] x 100 = 690.7%
Formula
Percentage change = [(680 - 86) / 86] x 100
Subtract the new number by the original number
680 - 86 = 594
594 ÷ 86 = 6.906976744186046
6.906976744186046 x 100 = 690.7%