Discussion

Explanation:

37.5% = $\frac{3}{8}$ and 87.5% = $\frac{7}{8}$

Let the number be x. 

Then, from the problem $\frac{3}{8}$× x = 450.    

∴ x = 450 × $\frac{8}{3}$

Hence, 87.5% of x = $\frac{7}{8}$× x = $\frac{7}{8}$× 450 × $\frac{8}{3}$ = 1050.

Hence, option (c).

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