Percentage
MCQs Math


Question:     165 is what percent of 310? Or, What percent of 310 is equal to 165?


Correct Answer  53.23%

Solution And Explanation

Solution

Given number = 310

To find, 165 is what percent of 310?

This question can be written as also

What percent of 310 is equal to 165?

⇒ ?% of 310 = 165

Let ? = m

And the meaning of "of" in mathematics is "Multiplication".

∴ m% of 310 = 165

⇒ m% × 310 = 165

m/100 × 310 = 165

310 m/100 = 165

After cross multiplication, we get

310 m = 165 × 100

After transposing 310 to RHS, we get

m = 165 × 100/310

⇒ m = 16500/310

⇒ m = 53.23%

Thus, 53.23% of 310 = 165

Thus, Answer = 53.23%

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 310 = 165

Here, we have ? = m

a = 310

And, b = 165

Thus, using formula

⇒ m = 165 × 100/310

= 165 × 100/310

= 16500/310 = 53.23%

Thus, 53.23% of 310 = 165

Thus, 53.23% Answer


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