320.78% is the change from 77 to 324
Calculation steps:
[( 324 - 77 ) ÷ 77] x 100 = 320.78%
Formula
Percentage change = [(324 - 77) / 77] x 100
Subtract the new number by the original number
324 - 77 = 247
247 ÷ 77 = 3.207792207792208
3.207792207792208 x 100 = 320.78%