-73.3% is the change from 206 to 55
Calculation steps:
[( 55 - 206 ) ÷ 206] x 100 = -73.3%
Formula
Percentage change = [(55 - 206) / 206] x 100
Subtract the new number by the original number
55 - 206 = -151
-151 ÷ 206 = -0.7330097087378641
-0.7330097087378641 x 100 = -73.3%