Question

find the difference
1) 5/7-3/7
2)11/16-7/12
3)7/9-2/3
3)15/19-12/57​

Answer 1

1) 5/7- 3/7 = 2/7 ( SAME DENOMINATORS SO SUBTRACT THE NUMERATORS).

2) 11/16 - 7/12 ( DIFFERENT DENOMINATORS SO WE WANT TO TAKE L.C.M). L.C.M = 48

= 11 INTO 3 - 7 INTO 4 /48

= 33 - 28/48

= 5 /48

3) 7/9 - 2/3  ( DIFFERENT DENOMINATORS SO WE WANT TO TAKE L.C.M). L.C.M = 9

= 7 INTO 1  - 2 INTO 2 / 9

= 7 - 4/9

= 3/9

= 1/3

4) 15/19 - 12/57( DIFFERENT DENOMINATORS SO WE WANT TO TAKE L.C.M). L.C.M = 57

= 15 INTO 3 - 12 INTO 1 /57

= 45 - 12 /57

= 33/57