1. [tex]\dfrac{9}{25}[/tex] of students ride the bus to school. Note that
[tex]\dfrac{9}{25}=\dfrac{9\cdot 2}{25\cdot 2}=\dfrac{18}{50}.[/tex]
2. [tex]\dfrac{19}{50}[/tex] of students walk to school.
3. The fraction of students that ride the bus or walk to school is
[tex]\dfrac{18}{50}+\dfrac{19}{50}=\dfrac{18+19}{50}=\dfrac{37}{50}.[/tex]
Answer: the fraction of students that ride the bus or walk to school is [tex]\dfrac{37}{50}.[/tex]
