# 9.  Jaidev takes $2\frac{1}{5}$  minutes to walk across the school ground. Rahul takes $\frac{7}{4}$ minutes to do the same. Who takes less time and by what fraction?

D Devendra Khairwa

Firstly, let us convert the time taken by Jaidev in improper fraction from mixed fraction.

$2\frac{1}{5}\ =\ \frac{10\ +\ 1}{5}\ =\ \frac{11}{5}$

Now, comparing both, we have :

$\frac{11}{5}\ >\ \frac{7}{4}$

Also,               $\frac{11}{5}\ -\ \frac{7}{4}\ =\ \frac{11\times 4\ -\ 7\times 5}{20}\ =\ \frac{9}{20}$

Hence Rahul takes less time as compared to Jaidev by   $\frac{9}{20}\ minute$   fraction.

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