136.56% is the change from 320 to 757
Calculation steps:
[( 757 - 320 ) ÷ 320] x 100 = 136.56%
Formula
Percentage change = [(757 - 320) / 320] x 100
Subtract the new number by the original number
757 - 320 = 437
437 ÷ 320 = 1.365625
1.365625 x 100 = 136.56%