12%12% of the student population in a school are left-handed. In a classroom of 2525 students, how many are left-handed and how many are right-handed?

2 Answers
Feb 1, 2018

12%12% or 3/25325 of the students are left-handed.

88%88% or 22/252225 of the students are right-handed.

Explanation:

12%=12/10012%=12100

Both 1212 and 100100 are divisible by 44. Simplify 12/10012100 by dividing the numerator and denominator by 44.

(12-:4)/(100-:4)=12÷4100÷4=

3/25325

3/25325 of the students are left-handed.

The percentage of all students is 100%100%. The percentage of right-handed students is:

100%-12%=88%100%12%=88%

88%=88/10088%=88100

Simplify 88/10088100 by dividing the numerator and denominator by 44.

(88-:4)/(100-:4)=88÷4100÷4=

22/252225

88%88% or 22/252225 students are right-handed. Therefore, the majority of students are right-handed.

Feb 1, 2018

=3/25=325

Explanation:

  1. The left-handed students is given at 12%. This can be interpreted in fractional form as;
    12/10012100
  2. Find the factors of these numbers to reduce the fraction to its lowest form.
    12/100=(cancel((4))(3))/(cancel((4))(25))
    This mean that 3 out of 25 students are left-handed.
  3. Therefore, 22 of these students are right-handed.