A number increased by 37.5% gives 99. The number is:
Answer: B
Let the number be x. An increase of 37.5% means the new number is 137.5% of the original.
Note that 37.5% = 3/8.
So, the new number is \(x + \frac{3}{8}x = \frac{11}{8}x\).
\(\frac{11}{8}x = 99\)
\(x = 99 \times \frac{8}{11} = 9 \times 8 = 72\).