Given that 1:3 =x : 21
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(i) Find 1/3 of 21. To find 1/3 of 21, we multiply the numerator 1 by the given whole number 21 and then divide the product 21 by the denominator 3. So, 1/3 of 21 = 7. (ii) Find 2/5 of 15.
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x = 7 is the correct answer
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