Simply multiply the number of students by the percentage as a decimal: 10% multiply by .1
Baby-sitting: 308 students (1400 x .22)
Sports: 364 students (1400x .26)
Job: 210 students (1400 x .15)
At home: 140 students (1400 x .1)
Tutoring: 140 students (1400 x .1)
Other: 238 students (1400 x .17)