AbdurRakib
If mn ≠ 0 and 25 percent of n equals \(37\frac{1}{2}\) percent of m, what is the value of \(\frac{12n}{m}\)?
A) 18
B) \(\frac{32}{3}\)
C) 8
D) 3
E) \(\frac{9}{8}\)
OG 2017 New Question
I’ll try to explain a reasoning-based approach to solving this question. This approach would require a clear understanding of what percentages represent.
Let's compare incomes - mine with Jeff Bezos's. He's the richest man in the world in 2021 according to Forbes. I am ... not.
So,
1. Would his income be a fraction of mine?
2. Or, would my income be a fraction of his?
The latter, right? Not just that, my income would be a very small fraction of his. In percentage terms, 100% of my income would be equivalent to ~0.0...1% of Bezos's income. Makes sense?
Now, let’s talk about cakes for a bit.
We have two cakes.
Half of the first cake weighs the same as the full second cake.
Based on this statement, can you understand which cake would be bigger?
A fraction of one cake weighs the same as a full cake. So the first cake must have been the bigger one. After all, we just needed a fraction of the first to be equivalent to the full second one.
Next,
Say, a quarter of the first cake weighs the same as half of the second cake.
Now, can you understand which cake would be bigger?
A smaller portion of the first cake weighs the same as a larger portion of the second. So, the first cake must be bigger.
Back to the question.
A smaller percentage of n is equivalent to a larger percentage of m.
Based on this information, can you understand which of n and m would be greater?
'n' would be greater.
We need to figure out 12xn/m. If n > m, n/m > 1.
So, we're looking for 12 times [something more than 1]. Thus, the result will be greater than 12. Answer choices, 32/3, 8, 3, and 9/8 are all smaller than 12 and can be eliminated. We're left with only one answer choice that's greater than 12. So, 12n/m must be 18.