# math

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Suppose that 16 inches of wire costs 64 cents.
At the same rate, how many inches of wire can be bought for 48 cents?

• math -

48 is 3/4 of 64 cents
so, what's 3/4 of 16 inches?

• math -

16:64=48:x
16/64=48/x
1/4=48/x
by cross multiplication
x=192
so you can buy 192inches of wire.

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