21.98% is the change from 819 to 999
Calculation steps:
[( 999 - 819 ) ÷ 819] x 100 = 21.98%
Formula
Percentage change = [(999 - 819) / 819] x 100
Subtract the new number by the original number
999 - 819 = 180
180 ÷ 819 = 0.21978021978021978
0.21978021978021978 x 100 = 21.98%