-86.76% is the change from 423 to 56
Calculation steps:
[( 56 - 423 ) ÷ 423] x 100 = -86.76%
Formula
Percentage change = [(56 - 423) / 423] x 100
Subtract the new number by the original number
56 - 423 = -367
-367 ÷ 423 = -0.8676122931442081
-0.8676122931442081 x 100 = -86.76%