212.19% is the change from 320 to 999
Calculation steps:
[( 999 - 320 ) ÷ 320] x 100 = 212.19%
Formula
Percentage change = [(999 - 320) / 320] x 100
Subtract the new number by the original number
999 - 320 = 679
679 ÷ 320 = 2.121875
2.121875 x 100 = 212.19%