-98.63% is the change from 947 to 13
Calculation steps:
[( 13 - 947 ) ÷ 947] x 100 = -98.63%
Formula
Percentage change = [(13 - 947) / 947] x 100
Subtract the new number by the original number
13 - 947 = -934
-934 ÷ 947 = -0.986272439281943
-0.986272439281943 x 100 = -98.63%