Question

In a survey, a group of students are asked their favorite sport. 18 students chose "other"

Football- 37.5%
Baseball- 40%
Other-?%

How many students participated?

How many chose football?

Answer 1

so assuming that each student chose only one sport or 'other', add the percents and subtract from 100
37.5+40=77.5
100-77.5=22.5
22.5%=other
18 students=22.5%
divide both sides by 22.5
0.8=1%
therfor
100%=80
80 students participated

futbol=37.5% of 80=0.375 times 80=30
30 picked football