Find the difference of:(i) (21/25) and (18/20)(ii) 3 (3/10) and 2 (7/1

1.	Find the difference of:(i) (21/25) and (18/20)(ii) 3 (3/10) and 2 (7/15)
Answer» (i) Given (21/25) and (18/20) To find the difference we have to make it equivalent fractions. Taking LCM of 25 and 20 is 100. Now converting the given fractions into equivalent fractions with denominator 100. (18/20) – (21/25) = (90/100) – (84/100) = (90 – 84)/100 = 6/100 By converting it into its simplest form we get = 3/50 (ii) Given 3 (3/10) and 2 (7/15) First convert given mixed fractions into improper fractions. (33/10) and (37/15) To find the difference we have to make it equivalent fractions. Taking LCM of 10 and 15 is 30. Now converting the given fractions into equivalent fractions with denominator 30. (33/10) – (37/15) = (99/30) – (74/30) = (99 – 74)/30 = (25/30) By converting it into simplest form we get = (5/6)

Find the difference of:(i) (21/25) and (18/20)(ii) 3 (3/10) and 2 (7/15)

Answer»

(i) Given (21/25) and (18/20)

To find the difference we have to make it equivalent fractions.

Taking LCM of 25 and 20 is 100.

Now converting the given fractions into equivalent fractions with denominator 100.

(18/20) – (21/25)

= (90/100) – (84/100)

= (90 – 84)/100

= 6/100

By converting it into its simplest form we get

= 3/50

(ii) Given 3 (3/10) and 2 (7/15)

First convert given mixed fractions into improper fractions.

(33/10) and (37/15)

To find the difference we have to make it equivalent fractions.

Taking LCM of 10 and 15 is 30.

Now converting the given fractions into equivalent fractions with denominator 30.

(33/10) – (37/15)

= (99/30) – (74/30)

= (99 – 74)/30

= (25/30)

By converting it into simplest form we get

= (5/6)