-25.38% is the change from 666 to 497
Calculation steps:
[( 497 - 666 ) ÷ 666] x 100 = -25.38%
Formula
Percentage change = [(497 - 666) / 666] x 100
Subtract the new number by the original number
497 - 666 = -169
-169 ÷ 666 = -0.25375375375375375
-0.25375375375375375 x 100 = -25.38%