-79.32% is the change from 266 to 55
Calculation steps:
[( 55 - 266 ) ÷ 266] x 100 = -79.32%
Formula
Percentage change = [(55 - 266) / 266] x 100
Subtract the new number by the original number
55 - 266 = -211
-211 ÷ 266 = -0.793233082706767
-0.793233082706767 x 100 = -79.32%