-90.43% is the change from 209 to 20
Calculation steps:
[( 20 - 209 ) ÷ 209] x 100 = -90.43%
Formula
Percentage change = [(20 - 209) / 209] x 100
Subtract the new number by the original number
20 - 209 = -189
-189 ÷ 209 = -0.9043062200956937
-0.9043062200956937 x 100 = -90.43%