-54.36% is the change from 997 to 455
Calculation steps:
[( 455 - 997 ) ÷ 997] x 100 = -54.36%
Formula
Percentage change = [(455 - 997) / 997] x 100
Subtract the new number by the original number
455 - 997 = -542
-542 ÷ 997 = -0.5436308926780341
-0.5436308926780341 x 100 = -54.36%