-67.62% is the change from 491 to 159
Calculation steps:
[( 159 - 491 ) ÷ 491] x 100 = -67.62%
Formula
Percentage change = [(159 - 491) / 491] x 100
Subtract the new number by the original number
159 - 491 = -332
-332 ÷ 491 = -0.6761710794297352
-0.6761710794297352 x 100 = -67.62%