-73.72% is the change from 666 to 175
Calculation steps:
[( 175 - 666 ) ÷ 666] x 100 = -73.72%
Formula
Percentage change = [(175 - 666) / 666] x 100
Subtract the new number by the original number
175 - 666 = -491
-491 ÷ 666 = -0.7372372372372372
-0.7372372372372372 x 100 = -73.72%