-44.9% is the change from 490 to 270
Calculation steps:
[( 270 - 490 ) ÷ 490] x 100 = -44.9%
Formula
Percentage change = [(270 - 490) / 490] x 100
Subtract the new number by the original number
270 - 490 = -220
-220 ÷ 490 = -0.4489795918367347
-0.4489795918367347 x 100 = -44.9%