Question

Deepti went to school for $216$ days in a full year. If her attendance is $90\%,$ find the number of days on which the school was opened.

Answer 1

Let the school was opened for $x$ days in the given year.

It is given that Deepti went $216$ days in a full year.

Her Attendance $=90\%$

We have: $90\%$ of $x=216$

$\Rightarrow \frac{90x}{100}=216$

$\Rightarrow x=216\times \frac{100}{90}=240$

The school opened for $240$ days in the given year.