277.78% is the change from 180 to 680
Calculation steps:
[( 680 - 180 ) ÷ 180] x 100 = 277.78%
Formula
Percentage change = [(680 - 180) / 180] x 100
Subtract the new number by the original number
680 - 180 = 500
500 ÷ 180 = 2.7777777777777777
2.7777777777777777 x 100 = 277.78%