-4.78% is the change from 209 to 199
Calculation steps:
[( 199 - 209 ) ÷ 209] x 100 = -4.78%
Formula
Percentage change = [(199 - 209) / 209] x 100
Subtract the new number by the original number
199 - 209 = -10
-10 ÷ 209 = -0.04784688995215311
-0.04784688995215311 x 100 = -4.78%