-68.17% is the change from 311 to 99
Calculation steps:
[( 99 - 311 ) ÷ 311] x 100 = -68.17%
Formula
Percentage change = [(99 - 311) / 311] x 100
Subtract the new number by the original number
99 - 311 = -212
-212 ÷ 311 = -0.6816720257234726
-0.6816720257234726 x 100 = -68.17%