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| Math Central | Quandaries & Queries |
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Question from Johanna: I have a pieces of 3/4" sch40 (round tube) 240" long at $70. What is our cost? We also add 35% to our cost for selling price. How do I figure this out? |
Hi Johanna,
If I understand correctly you have added 35% to your cost and arrived at $\$70.$ Thus if your cost is $C$ dollars then
\[C + 0.35 \times C = \$70.\]
That is
\[1.35 C = \$70.\]
Dividing both sides by 1.35 gives
\[C = \frac{\$70}{1.35}.\]
Penny
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