-66.4% is the change from 491 to 165
Calculation steps:
[( 165 - 491 ) ÷ 491] x 100 = -66.4%
Formula
Percentage change = [(165 - 491) / 491] x 100
Subtract the new number by the original number
165 - 491 = -326
-326 ÷ 491 = -0.6639511201629328
-0.6639511201629328 x 100 = -66.4%