If you can buy 1/4 pizza for 5 dollars, how much can you purchase for 8 dollars?

2 Answers
Ben G.
Mar 26, 2017

#2/5# of a pizza

Explanation:

First step: figure out how much one pizza costs. If a quarter of a pizza costs $5, it figures that one pizza costs #5xx4 = $20#. This is worked out mathematically by dividing the cost by the amount of pizza:

#5/(1/4) = 20#

Now you can work out how much pizza you get for $8 by doing the same in reverse: dividing $8 by the cost for one whole pizza:

#8/20 = 0.4 = 2/5#

EZ as pi
Mar 27, 2017

#2/5# of a pizza.

Explanation:

This question can be done as a direct proportion.
The MORE pizza you buy, the MORE you will pay.

#("pizza" rarr)/("price"rarr) = 0.25/5 = x/8" "larr# cross multiply

#5x = 0.25 xx 8#

#5x = 2#

#x = 2/5#

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