121.9% is the change from 137 to 304
Calculation steps:
[( 304 - 137 ) ÷ 137] x 100 = 121.9%
Formula
Percentage change = [(304 - 137) / 137] x 100
Subtract the new number by the original number
304 - 137 = 167
167 ÷ 137 = 1.218978102189781
1.218978102189781 x 100 = 121.9%