-67.81% is the change from 991 to 319
Calculation steps:
[( 319 - 991 ) ÷ 991] x 100 = -67.81%
Formula
Percentage change = [(319 - 991) / 991] x 100
Subtract the new number by the original number
319 - 991 = -672
-672 ÷ 991 = -0.6781029263370333
-0.6781029263370333 x 100 = -67.81%