Question 540864
Okay, let's say you had $50 and you needed to divide it out to 5 different people. How much would each person get? In this case, you are looking for dollars per person. (per means divided by)
{{{Dollars/Person}}}
The way you can show that with math is to say that $50/5 people=$10 per person. In this case you started with $50 and divided it out to 5 people.
{{{WhatYouStartWith/WhatItsDividedOutTo}}}
So it doesn't matter what you're looking at, you can just use the "per" as a dividing symbol for whatever you're looking to calculate.
Elephants per circus = {{{Elephants/Circus}}}
Circuses per elephant = {{{Circuses/elephants}}}
Tickets per stadium = {{{Tickets/Stadium}}}
Beats per minute = {{{Beats/Minute}}}
Random Words said per minute of me talking = {{{RandomWordsSaid/MinutesOfMeTalking}}}
A per B = {{{A/B}}}
The same holds true with your two questions.
Your first question is asking, how many dollars paid per pound of flour? We know what to do here:
{{{Dollars/PoundOfFlour}}} = {{{5/12}}}
The 2nd question is asking pounds of seed per acre. Hopefully you're comfortable with this by now, and know to just put the "per ___" on the bottom. That gives you:
{{{PoundsOfSeed/Acre}}} = {{{45/5}}}