139.38% is the change from 320 to 766
Calculation steps:
[( 766 - 320 ) ÷ 320] x 100 = 139.38%
Formula
Percentage change = [(766 - 320) / 320] x 100
Subtract the new number by the original number
766 - 320 = 446
446 ÷ 320 = 1.39375
1.39375 x 100 = 139.38%