Respuesta :

Start by dividing 13% by 100 because  we need to make it into a decimal 
13/100=0.13
of=multiply 
So from here we simply multiply:
0.13*80=10.4
So our final answer would be: 10.4  
We have an equation: ?/80= 13/100

Cross multiply:
100*?= 13*80
⇒ ?= 13*80/100= 10.4

13% of 80 is 10.4~
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