-64.9% is the change from 490 to 172
Calculation steps:
[( 172 - 490 ) ÷ 490] x 100 = -64.9%
Formula
Percentage change = [(172 - 490) / 490] x 100
Subtract the new number by the original number
172 - 490 = -318
-318 ÷ 490 = -0.6489795918367347
-0.6489795918367347 x 100 = -64.9%