148.78% is the change from 123 to 306
Calculation steps:
[( 306 - 123 ) ÷ 123] x 100 = 148.78%
Formula
Percentage change = [(306 - 123) / 123] x 100
Subtract the new number by the original number
306 - 123 = 183
183 ÷ 123 = 1.4878048780487805
1.4878048780487805 x 100 = 148.78%