138.75% is the change from 320 to 764
Calculation steps:
[( 764 - 320 ) ÷ 320] x 100 = 138.75%
Formula
Percentage change = [(764 - 320) / 320] x 100
Subtract the new number by the original number
764 - 320 = 444
444 ÷ 320 = 1.3875
1.3875 x 100 = 138.75%