If selling price is doubled, the profit tripled, find the profit percent?
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Doubling SP triples profit — took me a while to see the trick is that SP itself contains the cost. Ended up with a clean equation. Any tips on recognizing this pattern fast?
Set cost = C and original SP = S, write both profits and you'll see it collapse.
Yeah, keeping the profit in terms of C only is the key move here.
This one felt more like a 700+ level. I initially tried plugging numbers and got lost; algebra is cleaner.
Same, picking numbers like C = 100 helped me too but algebra is safer.
Wait, is the answer 100%? Because if SP is doubled and profit tripled… let me recheck.
Check by choosing C = 100 and testing which SP makes it work.
Nice question. Profit percent over cost is the trap — people often compare to SP. Solid 700 level.
What it tests
Your ability to compute percentage change, percentage of a whole, and to work backwards from a final value.
Common trap
Treating successive percentage changes as additive — a 10% rise then a 10% fall is not back to the start.