Question

Arrange the following in descending
order

1. 2/9 , 2/3 , 8/21
2. 1/5 , 3/5 , 7/10​

Answer 1

1. 2/3, 8/21, 2/9

2. 7/10, 3/5, 1/5

Answer 2

Answer:

1 : to find which number is greater or smaller first makes denominator equal

common denominator = lcm of 9,3,21 = 63

make denominators equal

$\frac{2}{9} = \frac{2 \times 7}{9 \times 7} = \frac{14}{63}$

$\frac{2}{3} = \frac{2 \times 21}{3 \times 21} = \frac{42}{63}$

$\frac{8}{21} = \frac{8 \times 3}{21 \times 3} = \frac{24}{63}$

so decending order =

$\frac{2}{3} > \frac{8}{21} > \frac{2}{9}$