-78.47% is the change from 209 to 45
Calculation steps:
[( 45 - 209 ) ÷ 209] x 100 = -78.47%
Formula
Percentage change = [(45 - 209) / 209] x 100
Subtract the new number by the original number
45 - 209 = -164
-164 ÷ 209 = -0.784688995215311
-0.784688995215311 x 100 = -78.47%