# Mathematical Aptitude - Ratio Proportion, Percentage and Discounting

>>>>>>>>Ratio Proportion, Percentage and Discounting

• Option : B
• Explanation : (100 – 12.5)%, i.e., 87.5% of total income = 3500,
total income = 3,500 × 100/87.5 = 4000

• Option : D
• Explanation : +20 − 20 + (−20) × (+20)/100 = −4%

• Option : B
• Explanation : Let Y’s salary = 100, then X’s salary = 50
X’s new salary = 50 × 3/2 = 75
Y’s new salary = 100 × 5/4 = 125
Combined old salary = 100 + 50 = 150
New combined salary = 75 + 125 = 200
Increase in combined salary = 50
Percentage increase = 50/150 × 100 = 33.33%

• Option : A
• Explanation : Let x water to be added to make water 20% of new mixture.
Water in old mixture = 10% of 40 = 4 l
Water in new mixture to make it 20% = (4 + x) l
Now 20% of (40 + x) l = 4 + x
Solving equation, we get x = 5 l.

• Option : D
• Explanation : Let income = 100
New income = 120
New expenditure = 75 + 10% of 75 = 82.5%
New savings = 120 − 82.5 = 37.5
Old saving = 25,
Percentage increase in savings
= (37.5 − 25)/25 × 100
= 12.5/25 × 100 = 50%

## Description

• Ratio Proportion Questions can be used to give quizzes by any candidate who is preparing for UGC NET Paper 1
• This Ratio Proportion Questions section will help you test your analytical skills in a tricky method, thereby giving you an edge over other students
• All candidates who have to appear for the Kendriya Vidyalaya Entrance exam can also refer to this mcq section.
• You can also get access to the Ratio Proportion MCQ ebook.
• Ratio Proportion Questions can be used in the preparation of JRF, CSIR, and various other exams.