Ivan needs to memorize words on a vocabulary list for Russian class. He has 20 words to memorize, and he is four-fifths done. How many words has Ivan memorized so far?

16.

Explanation:

As per the question,

Number of words to be memorized = 20

Portion he has done = 4/5

No. Of words he has memorized so far = 20 * 4/5 = 16 words.

Thus, the no. of words that Ivan has memorized till now would be sixteen(16) as out of the total(five-fifths) which means five portions of four words each, Ivan has learned four of them that means 4*4 = 16. Therefore, 16(sixteen) is the answer.

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