One number is 25% of a second number, and the second number is 70% of a third number. The first number is what percent of the third number?

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Let the numbers be \(x\), \(y\), and \(z\) for the first, second, and third numbers, respectively. Then,

$$ x = 0.25y $$ $$ y= 0.70z $$

We want to find a relationship between the first and last number.

$$ x=0.25(0.70)z $$ $$ x=0.175z $$