-45.45% is the change from 990 to 540
Calculation steps:
[( 540 - 990 ) ÷ 990] x 100 = -45.45%
Formula
Percentage change = [(540 - 990) / 990] x 100
Subtract the new number by the original number
540 - 990 = -450
-450 ÷ 990 = -0.45454545454545453
-0.45454545454545453 x 100 = -45.45%