-73.81% is the change from 210 to 55
Calculation steps:
[( 55 - 210 ) ÷ 210] x 100 = -73.81%
Formula
Percentage change = [(55 - 210) / 210] x 100
Subtract the new number by the original number
55 - 210 = -155
-155 ÷ 210 = -0.7380952380952381
-0.7380952380952381 x 100 = -73.81%