Question : 5 is what percent of 36? Or, What percent of 36 is equal to 5?
Correct Answer 13.89%
Solution & Explanation
Solution
Method (1)
Given number = 36
To find, 5 is what percent of 36?
This question can be written as also
What percent of 36 is equal to 5?
⇒ ?% of 36 = 5
Let ? = m
And the meaning of "of" in mathematics is "Multiplication".
∴ m% of 36 = 5
⇒ m% × 36 = 5
⇒ m/100 × 36 = 5
⇒ 36 m/100 = 5
After cross multiplication, we get
36 m = 5 × 100
After transposing 36 to RHS, we get
m = 5 × 100/36
⇒ m = 500/36
⇒ m = 13.89%
Thus, 13.89% of 36 = 5
Thus, Answer = 13.89%
Method (2) Shortcut Method
Shortcut Method to find a number is what percent of other
If we have to find
? % of a = b
Here, let ? = m
Thus, above expression can be written as
m% of a = b
⇒ m/100 × a = b
⇒ m × a/100 = b
After cross multiplication, we get
m × a = b × 100
⇒ m = b × 100/a
Thus, using this formula, we can find a number (a) is what (m) percent of b
In the question, we have to find what percent of 36 = 5
Here, we have ? = m
a = 36
And, b = 5
Thus, using formula
⇒ m = 5 × 100/36
= 5 × 100/36
= 500/36 = 13.89%
Thus, 13.89% of 36 = 5
Thus, 13.89% Answer
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