131.4% is the change from 121 to 280
Calculation steps:
[( 280 - 121 ) ÷ 121] x 100 = 131.4%
Formula
Percentage change = [(280 - 121) / 121] x 100
Subtract the new number by the original number
280 - 121 = 159
159 ÷ 121 = 1.3140495867768596
1.3140495867768596 x 100 = 131.4%