91Ó°ÊÓ

Write each fraction. (Note to students: In case you know how to simplify fractions, none of the fractions in this section are simplified.) See Example 9. Of the eight planets in our solar system, four have days that are longer than the 24-hour Earth day. What fraction of the planets have longer days than Earth has? (Source: National Space Science Data Center).

Evaluate each expression for the given replacement values. $$ x-y ; x=\frac{7}{8}, y=\frac{9}{8} $$

Add. $$ \begin{array}{r} 4 \frac{1}{3} \\ 9 \frac{2}{5} \\ +3 \frac{1}{6} \\ \hline \end{array} $$

$$ \frac{1}{13}-\frac{4}{13} $$

Write each fraction in simplest form. \(\frac{60 a^{2} b}{36 a b^{3}}\)

Evaluate each expression for the given replacement values. $$ x-y ; x=-\frac{1}{5}, y=-\frac{3}{5} $$

$$ -\frac{2}{5}+\frac{1}{3}-\frac{3}{10} $$

Subtract. $$ \begin{array}{r} 4 \frac{7}{10} \\ -2 \frac{1}{10} \\ \hline \end{array} $$

Write each fraction. (Note to students: In case you know how to simplify fractions, none of the fractions in this section are simplified.) See Example 9. The 2016 Atlantic hurricane season was the deadliest since 2005. It was an above-average season, producing 15 named tropical storms, 10 of which turned into hurricanes. What fraction of the 2016 Atlantic tropical storms escalated into hurricanes?

Write each fraction in simplest form. \(\frac{90}{120}\)