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 opened for x days in the given year.
We have: 
90 % of x = 216
\[ \Rightarrow \frac{90}{100}x = 216\]
\[ \Rightarrow x = \frac{216 \times 100}{90}\]
\[ = 240\]
∴ The school opened for 240 days in the given year.