A grocery store sells 4 pounds of grapes for $6. How much would 15 pounds of grapes cost at this rate?

6 and 4 can both be divided by 2. Divide the numerator and denominator by 2 to rename the fraction.

×415​

×415​

Pounds of GrapesPrice4$615

6 ·415​=1·46·15​=

6

 · 15

1·  

4

$22.50

So, 15 pounds of grapes would cost $22.50 at this rate.