-92.78% is the change from 277 to 20
Calculation steps:
[( 20 - 277 ) ÷ 277] x 100 = -92.78%
Formula
Percentage change = [(20 - 277) / 277] x 100
Subtract the new number by the original number
20 - 277 = -257
-257 ÷ 277 = -0.927797833935018
-0.927797833935018 x 100 = -92.78%