-81.58% is the change from 304 to 56
Calculation steps:
[( 56 - 304 ) ÷ 304] x 100 = -81.58%
Formula
Percentage change = [(56 - 304) / 304] x 100
Subtract the new number by the original number
56 - 304 = -248
-248 ÷ 304 = -0.8157894736842105
-0.8157894736842105 x 100 = -81.58%