-87.8% is the change from 451 to 55
Calculation steps:
[( 55 - 451 ) ÷ 451] x 100 = -87.8%
Formula
Percentage change = [(55 - 451) / 451] x 100
Subtract the new number by the original number
55 - 451 = -396
-396 ÷ 451 = -0.8780487804878049
-0.8780487804878049 x 100 = -87.8%