-96.23% is the change from 345 to 13
Calculation steps:
[( 13 - 345 ) ÷ 345] x 100 = -96.23%
Formula
Percentage change = [(13 - 345) / 345] x 100
Subtract the new number by the original number
13 - 345 = -332
-332 ÷ 345 = -0.9623188405797102
-0.9623188405797102 x 100 = -96.23%