145.9% is the change from 305 to 750
Calculation steps:
[( 750 - 305 ) ÷ 305] x 100 = 145.9%
Formula
Percentage change = [(750 - 305) / 305] x 100
Subtract the new number by the original number
750 - 305 = 445
445 ÷ 305 = 1.459016393442623
1.459016393442623 x 100 = 145.9%