-78.38% is the change from 666 to 144
Calculation steps:
[( 144 - 666 ) ÷ 666] x 100 = -78.38%
Formula
Percentage change = [(144 - 666) / 666] x 100
Subtract the new number by the original number
144 - 666 = -522
-522 ÷ 666 = -0.7837837837837838
-0.7837837837837838 x 100 = -78.38%