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Mathematics

Convert the following into percentage:

(a) 17 : 100

(b) 3 : 25

(c) 18 out of 20 students passed the test. What percent passed?

Ratio Proportion

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Answer

(a) Given,

⇒ 17 : 100 = 17100\dfrac{17}{100}

⇒ 17100×100%\dfrac{17}{100} \times 100\% = 17%.

(b) Given,

⇒ 3 : 25 = 325\dfrac{3}{25}

⇒325×100%=3×4\Rightarrow \dfrac{3}{25} \times 100\% = 3 \times 4 = 12%

(c) Given,

Students passed = 18 out of 20.

Percentage passed = 1820×100%\dfrac{18}{20} \times 100\% = 90%.

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