If a student scores 72 marks, which is 80% of the total, what is the total number of marks?

If a student scores 72 marks, which is 80% of the total, what is the total number of marks?

Explanation

72 marks = 80% of total marks  


Let total marks = x  

So, 0.8x = 72 ⇒ x = 72 ÷ 0.8 = 90