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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
1y ago

What else can I help you with?