150% is the change from 306 to 765
Calculation steps:
[( 765 - 306 ) ÷ 306] x 100 = 150%
Formula
Percentage change = [(765 - 306) / 306] x 100
Subtract the new number by the original number
765 - 306 = 459
459 ÷ 306 = 1.5
1.5 x 100 = 150%
Example