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Please help!!1) The floor tiles come in red,blue and black. There are 16 red, 5 blue and 4 black. What percent of the tilesare black?2) Frank walks to school 35% of the time. If there are 180 days in a school year, how many days did he walk to school?

Respuesta :

1) we have

[tex]16+5+4=25[/tex]

25 tiles in total and 4 black tiles, then

25 ---> 100%

4 -----> x

[tex]\begin{gathered} 25\times x=4\times100 \\ 25x=400 \\ \frac{25x}{25}=\frac{400}{25} \\ x=16 \end{gathered}[/tex]

answer: 16 % of the tiles are black

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