-98.61% is the change from 933 to 13
Calculation steps:
[( 13 - 933 ) ÷ 933] x 100 = -98.61%
Formula
Percentage change = [(13 - 933) / 933] x 100
Subtract the new number by the original number
13 - 933 = -920
-920 ÷ 933 = -0.9860664523043944
-0.9860664523043944 x 100 = -98.61%