-81.64% is the change from 550 to 101
Calculation steps:
[( 101 - 550 ) ÷ 550] x 100 = -81.64%
Formula
Percentage change = [(101 - 550) / 550] x 100
Subtract the new number by the original number
101 - 550 = -449
-449 ÷ 550 = -0.8163636363636364
-0.8163636363636364 x 100 = -81.64%