142.06% is the change from 321 to 777
Calculation steps:
[( 777 - 321 ) ÷ 321] x 100 = 142.06%
Formula
Percentage change = [(777 - 321) / 321] x 100
Subtract the new number by the original number
777 - 321 = 456
456 ÷ 321 = 1.4205607476635513
1.4205607476635513 x 100 = 142.06%