Question

2/7th part of a certain sum was donated and 1/7th was spent on education. the balance amount will be
1)13/28
2)11/28
.3)5/28
4)14/28​

Answer 1

➤ Answer :-

Balance amount $=$

$\dashrightarrow \sf1 - \frac{2}{7} + \frac{1}{7}$

$\dashrightarrow \sf \frac{1}{1} - \frac{3}{7}$

LCM of 1 and 7 is 7.

$\dashrightarrow \sf \frac{1 \times 7}{1 \times 7} - \frac{3}{7}$

$\dashrightarrow \sf \frac{7}{7} - \frac{3}{7} = \frac{7 - 3}{7}$

$\dashrightarrow \sf \frac{4}{7}$

$\Huge\therefore$$\sf\frac{4}{7}$ of the amount is left with her.