Answer
$\frac{17}{40}$
Work Step by Step
To write a decimal as a fraction, put the decimal portion of the number in the numerator. Make the denominator the power of 10 that represents the rightmost place value. Reduce the fraction to lowest terms.
$0.42\underset\uparrow5=\frac{425}{1000}=\frac{425\div25}{1000\div25}=\frac{17}{40}$
thousandths place
