Instructions

What should come in the place of the question mark (?) in the following questions (?)

Question 153

$$9\frac{3}{4}+7\frac{2}{17}-9\frac{1}{15}$$=?

Solution

$$9\frac{3}{4}+7\frac{2}{17}-9\frac{1}{15}$$

This equals $$\frac{39}{4} + \frac{121}{17} - \frac{136}{15}$$
The LCM of $$4, 15, 17 = 1020$$

Hence, the required expression equals $$\frac{9945}{1020} + \frac{7260}{1020} - \frac{9248}{1020}$$

This equals $$\frac{7957}{1020} = 7\frac{817}{1020}$$

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