-18.2% is the change from 665 to 544
Calculation steps:
[( 544 - 665 ) ÷ 665] x 100 = -18.2%
Formula
Percentage change = [(544 - 665) / 665] x 100
Subtract the new number by the original number
544 - 665 = -121
-121 ÷ 665 = -0.18195488721804512
-0.18195488721804512 x 100 = -18.2%