142.86% is the change from 280 to 680
Calculation steps:
[( 680 - 280 ) ÷ 280] x 100 = 142.86%
Formula
Percentage change = [(680 - 280) / 280] x 100
Subtract the new number by the original number
680 - 280 = 400
400 ÷ 280 = 1.4285714285714286
1.4285714285714286 x 100 = 142.86%