-99.63% is the change from 271 to 1
Calculation steps:
[( 1 - 271 ) ÷ 271] x 100 = -99.63%
Formula
Percentage change = [(1 - 271) / 271] x 100
Subtract the new number by the original number
1 - 271 = -270
-270 ÷ 271 = -0.996309963099631
-0.996309963099631 x 100 = -99.63%