-90.2% is the change from 490 to 48
Calculation steps:
[( 48 - 490 ) ÷ 490] x 100 = -90.2%
Formula
Percentage change = [(48 - 490) / 490] x 100
Subtract the new number by the original number
48 - 490 = -442
-442 ÷ 490 = -0.9020408163265307
-0.9020408163265307 x 100 = -90.2%