-94.58% is the change from 277 to 15
Calculation steps:
[( 15 - 277 ) ÷ 277] x 100 = -94.58%
Formula
Percentage change = [(15 - 277) / 277] x 100
Subtract the new number by the original number
15 - 277 = -262
-262 ÷ 277 = -0.9458483754512635
-0.9458483754512635 x 100 = -94.58%