-18.98% is the change from 490 to 397
Calculation steps:
[( 397 - 490 ) ÷ 490] x 100 = -18.98%
Formula
Percentage change = [(397 - 490) / 490] x 100
Subtract the new number by the original number
397 - 490 = -93
-93 ÷ 490 = -0.18979591836734694
-0.18979591836734694 x 100 = -18.98%