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40/64

We note that both numbers are even. That is they will divide by '2'

So divide both numbers by '2'

Hence

20/32

Again both numbers are even, so divide by '2' again

10/16

Repeat again

5/8

Since '5' is a Prime number and odd, and '8' is a compound number and even, they will not cancel down.

So the answer is 5/8

This system is known as 'cancelling down'.

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lenpollock

Lvl 16
9mo ago
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Wiki User

12y ago

divide numerator and denominator by greatest common factor which is 8

40/64 = 5/8

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Q: How do you write 40 over 64 in simplest form?
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