Aptitude - Ratio and Proportion - Discussion
Discussion Forum : Ratio and Proportion - General Questions (Q.No. 11)
11.
The salaries A, B, C are in the ratio 2 : 3 : 5. If the increments of 15%, 10% and 20% are allowed respectively in their salaries, then what will be new ratio of their salaries?
Answer: Option
Explanation:
Let A = 2k, B = 3k and C = 5k.
| A's new salary = | 115 | of 2k = |  |
115 | x 2k |  |
= | 23k |
| 100 | 100 | 10 |
| B's new salary = | 110 | of 3k = | |
110 | x 3k | |
= | 33k |
| 100 | 100 | 10 |
| C's new salary = | 120 | of 5k = | |
120 | x 5k | |
= 6k |
| 100 | 100 |
 New ratio |
|
23k | : | 33k | : 6k | |
= 23 : 33 : 60 |
| 10 | 10 |
Discussion:
33 comments Page 1 of 4.
Green violet said:
2 decades ago
Why is that the amount of % is written as 115 instead of 15 ?
Manikandan S said:
2 decades ago
Why we have to use K there and how 15% is changed to 115?
Anurag said:
2 decades ago
@Mankandan :
We can also use x instead of k.
15% is changed to 115 it is a shortcut method to avoid long caluclation.
We can also use x instead of k.
15% is changed to 115 it is a shortcut method to avoid long caluclation.
Rama said:
1 decade ago
15% increase in salary = (100+15)% of 2k = (115/100)*2k.
Sumya said:
1 decade ago
@rama is very much right as here salary is increase from 100 to 115.
Rachana said:
1 decade ago
What is this k stands for ?
Prabhu said:
1 decade ago
Here k denotes the common multiplication number in all the 3 given ratio.
Boomadevi said:
1 decade ago
Why add this value 100+15?
Preety said:
1 decade ago
We can do like
15% of 2= 15/100*2=3/10 total value=2+3/10=23/10
10% of 3= 10/100*3=3/10 total value=3+3/10=33/10
20% of 5= 20/100*5=1 total value=5+1=6
New proportion is
23/10:33/10:6
or 23:33:60 ans.
15% of 2= 15/100*2=3/10 total value=2+3/10=23/10
10% of 3= 10/100*3=3/10 total value=3+3/10=33/10
20% of 5= 20/100*5=1 total value=5+1=6
New proportion is
23/10:33/10:6
or 23:33:60 ans.
Vijay raja said:
1 decade ago
115 is taken because
A'Value has increased by 15%.
Now we can find new salary of A in two ways:
1st way:
THEORY:Step 1: Calculating 15% in original salary ( i.e 2k)
Step 2: And then adding it to the original value to get increased salary.
Calculation:Step 1: (15/100)*2k= 3k/10
Step 2: (3k/10)+2k=23k/10
2nd way:
THEORY: If we consider 100% is the original value.
15% is increased
therefore 100%+15%=115%
115% of 2k gives 15% increased salary + original salary
NOTE:here we need only one step to calculate new salary.
CALCULATION: (115/100)*2k=23k/10
A'Value has increased by 15%.
Now we can find new salary of A in two ways:
1st way:
THEORY:Step 1: Calculating 15% in original salary ( i.e 2k)
Step 2: And then adding it to the original value to get increased salary.
Calculation:Step 1: (15/100)*2k= 3k/10
Step 2: (3k/10)+2k=23k/10
2nd way:
THEORY: If we consider 100% is the original value.
15% is increased
therefore 100%+15%=115%
115% of 2k gives 15% increased salary + original salary
NOTE:here we need only one step to calculate new salary.
CALCULATION: (115/100)*2k=23k/10
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