-98.61% is the change from 934 to 13
Calculation steps:
[( 13 - 934 ) ÷ 934] x 100 = -98.61%
Formula
Percentage change = [(13 - 934) / 934] x 100
Subtract the new number by the original number
13 - 934 = -921
-921 ÷ 934 = -0.9860813704496788
-0.9860813704496788 x 100 = -98.61%