## Ratio and Proportion Aptitude Concepts and Formulas## Points to Remember:## Ratio:A ratio can be defined as the relationship between two numbers by the division of the same kind. i.e., Ratio of x and y is written as x: y = x/y. In x: y, we can say that x is the numerator and y is the denominator, or in other words, x as the antecedent, and y the consequent.
## Rule of ratio:- Each and every term of the ratio should be multiplied or divided by the same non-zero number so that it does not affect the ratio.
## Proportion:A proportion refers to two ratios that are equivalent to each other.
Suppose there are 3 quantities like P, Q, and R. If they are a proportion, we can express them as In case of 4 quantities like P, Q, R, and S, which are a proportion, we can express them as ## Example of Ratio and Proportion:The income is divided between four person P, Q, R and S in the ratio 6:10:16:18 respectively. The share of S is 3744 more than the share of P. Find the total income of Q & R together? - 8112
- 4165
- 8056
- 7065
Let the total income = I Sum or the ratios = 50 P's share= (6/50) I, Q's share= (10/50) I, R's share= (16/50) I, S's share= (18/50) I And, S' share = P' share + 3744
Now, Q + R = (10/50)I + (16/50)I Or, Q + R = (26/50) x 15600Or, Q + R= 8112 Hence, we get the answer, but it looks like time-consuming. ## Quick Method:The above method may lead you to the correct answer but time management is the most important thing while solving the problems. The candidates need to try to solve the problems in the minimum possible time. Therefore, try this quick method which is faster than the standard way: We know that P's share= 6 parts; Q's share= 10 parts; R's share= 16 parts and S's share= 18 parts ATQ, S - P = 3744 = 18 parts - 6 parts = 12 parts= 3744 Or, 1 part = 3744/12 = 312 Ratio and Proportion Aptitude Test Paper 1 Ratio and Proportion Aptitude Test Paper 2 Ratio and Proportion Aptitude Test Paper 3 Ratio and Proportion Aptitude Test Paper 4 Next TopicArea Aptitude Test Paper 1 |