-97.47% is the change from 277 to 7
Calculation steps:
[( 7 - 277 ) ÷ 277] x 100 = -97.47%
Formula
Percentage change = [(7 - 277) / 277] x 100
Subtract the new number by the original number
7 - 277 = -270
-270 ÷ 277 = -0.9747292418772563
-0.9747292418772563 x 100 = -97.47%