Respuesta :

chi3fcomm5nd
10% means for every 100 she spend 10
in 800 there are 8 100 thus she speds 80
or 10% to decimal form is
[tex] \frac{10}{100} = \frac{1}{10} [/tex]
[tex]800 \times \frac{1}{10} = \frac{800}{10} = 80[/tex]