16 identical books weigh 90.88 kg. How much will 9 such books weigh?
.45 kg
.51.12 kg
.48.2 kg
.54.52 kg
The correct answer it 51.12 kg. I got the answer by making a proportion.
16 books 90.88kg
9 book X
I multiplied 90.88 * 9 = 817.92. Lastly, I divided 817.92 by 16 to get 51.12
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