-91.1% is the change from 146 to 13
Calculation steps:
[( 13 - 146 ) ÷ 146] x 100 = -91.1%
Formula
Percentage change = [(13 - 146) / 146] x 100
Subtract the new number by the original number
13 - 146 = -133
-133 ÷ 146 = -0.910958904109589
-0.910958904109589 x 100 = -91.1%