-87% is the change from 423 to 55
Calculation steps:
[( 55 - 423 ) ÷ 423] x 100 = -87%
Formula
Percentage change = [(55 - 423) / 423] x 100
Subtract the new number by the original number
55 - 423 = -368
-368 ÷ 423 = -0.8699763593380615
-0.8699763593380615 x 100 = -87%