Question

At an international school, half of the students are from the USA and Europe, two-fifths are from China and
India, and the rest of them are from Africa. What fraction of the students is from Africa? Express your answer as
a fraction in lowest terms.

Answer 1

Answer:

half of from europe and USA.

let the no of total student is 100

therefore the no of student of Europe ans usa is 50

now the remaining student is 100-50=50

noe the number of student of China and india is 2/5 of the total student

that's why 100*2/5=20

now the remaining student is 50-20=30

therefore the total number of African student is 30

therefore in fraction 100*3/5=30

that's why the fraction is 3/5

ans= 3/5

Answer 2

Answer:

$\frac{1}{10}$

Step-by-step explanation:

Let's think there are 400 students in that school.

Half are from USA and Europe which means $\frac{1}{2}$ of 400 students which is

400÷2=200

So 200 students are from USA and Europe. So 400-200=200.

So 200 students are left.

So from India and China

$\frac{2}{5}$ × 400 which is 400÷5=80.

So 80 students mean $\frac{1}{5}$ of 400. So 80×2=160. Then 160 = $\frac{2}{5}$ of 400 students

So 160 students are from India And China.

So 160+200 = 360 AND 400-360=40 and 40 is 10% of 400 or we can write it in fraction as $\frac{1}{10}$

So 40 students or $\frac{1}{10}$ people in that school are from Africa.