how to do solving ratio problems

[stargirl]

how to do solving ratio problems, if 7 pencils cost $.84, find the cost of 10 pencils how do you figure these kind of problems out?

 

[stapel]

if 7 pencils cost $.84

...then how much is one pencil? Hint: Divide.

find the cost of 10 pencils

Hint: Multiply.

 

[HallsofIvy]

Solve \(\displaystyle \dfrac{x}{10}= \dfrac{.84}{7}\)