2070.13 – The Price of a Dozen Kumquats

If $x$ dozen kumquats sell for $y$ dollars, write a formula for the cost of exactly $z$ kumquats. Check your formula by plugging in some easy numbers.

Solution

If $x$ dozen sell for $y$ , then one dozen sells for $\dfrac{y}{x}$ . One individual kumquat will sell for $\dfrac{y}{12x}$ . And $z$ individual kumquats will sell for $\dfrac{yz}{12x}$ .