Question

A man's monthly salary is Rs.12000. His wife's monthly salary is 20% less than his. Find their total monthly salary.

Answer 1

Hint: In this question, we are given a man's monthly salary along with information about his wife's salary. We need to find their total income. For this, we will first find 20% of the man's salary. Then we will subtract if from the man's salary to get his wife's salary. At last, adding them will give us their total monthly income.

Complete step by step answer:
Here we are given the salary of the man as Rs.12000.
Let us first find 20% of his salary by using the formula x% of y $ \Rightarrow \dfrac{x}{100}\times y $.
Here x is 20 and y is 12000. So, 20% of y $ \Rightarrow \dfrac{20}{100}\times 12000 $ .
Simplifying we get, $ \Rightarrow 20\times 120=Rs.2400 $ .
Therefore 20% of the man's salary is Rs.2400.
Now we are given that, wife's salary is 20% less than the salary of man, so we need to subtract 20% of man's salary from his whole salary to find his wife's salary.
So we can say,
Wife's salary = man's salary - 20% of man's salary.
Putting in the values we get,
Wife's salary $ \Rightarrow Rs.12000-Rs.2400=Rs.9600 $
Therefore, the wife's salary is Rs.9600.
Now to find their total monthly income, we need to add both of their incomes.
So we can say that,
Total monthly income = man's salary + wife's salary.
Putting in the values we get,
Total monthly income $ \Rightarrow Rs.12000+Rs.9600=Rs.21600 $ .
Hence total monthly income is Rs.21600.

Note:
Students should take care of the signs while subtracting. Students can assume the wife's salary as 20% of a man's salary but it is wrong. To avoid confusion, students can simply find 80% of a man’s salary which will be the wife's salary. Make sure to Rs. for every amount found.