-16.99% is the change from 471 to 391
Calculation steps:
[( 391 - 471 ) ÷ 471] x 100 = -16.99%
Formula
Percentage change = [(391 - 471) / 471] x 100
Subtract the new number by the original number
391 - 471 = -80
-80 ÷ 471 = -0.16985138004246284
-0.16985138004246284 x 100 = -16.99%