-99.68% is the change from 311 to 1
Calculation steps:
[( 1 - 311 ) ÷ 311] x 100 = -99.68%
Formula
Percentage change = [(1 - 311) / 311] x 100
Subtract the new number by the original number
1 - 311 = -310
-310 ÷ 311 = -0.9967845659163987
-0.9967845659163987 x 100 = -99.68%