210% is the change from 320 to 992
Calculation steps:
[( 992 - 320 ) ÷ 320] x 100 = 210%
Formula
Percentage change = [(992 - 320) / 320] x 100
Subtract the new number by the original number
992 - 320 = 672
672 ÷ 320 = 2.1
2.1 x 100 = 210%
Example