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?

Answers (1)

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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