-90.25% is the change from 277 to 27
Calculation steps:
[( 27 - 277 ) ÷ 277] x 100 = -90.25%
Formula
Percentage change = [(27 - 277) / 277] x 100
Subtract the new number by the original number
27 - 277 = -250
-250 ÷ 277 = -0.9025270758122743
-0.9025270758122743 x 100 = -90.25%