156.88% is the change from 109 to 280
Calculation steps:
[( 280 - 109 ) ÷ 109] x 100 = 156.88%
Formula
Percentage change = [(280 - 109) / 109] x 100
Subtract the new number by the original number
280 - 109 = 171
171 ÷ 109 = 1.5688073394495412
1.5688073394495412 x 100 = 156.88%