1) 3/5 - 1/7= (21/35) - (5/35)= 16/35
2) 5/3 - 4/9= (15/9) - (4/9)= 11/9
3) 24/25 - 7/15= (72/75) - (35/75)= 37/75
4) 11/80 - 11/90= (99/720) - (88/720)= 11/720
5) 2/5 * 3/7= 6/35
6) 3/5 * 2/27= 6/135= 2/45
7) 15/16 * 8/9= 120/144= 5/6
8) 5 * 2/11= 10/11
1) 3/5 - 1/7
= (21/35) - (5/35)
= 16/35
2) 5/3 - 4/9
= (15/9) - (4/9)
= 11/9
3) 24/25 - 7/15
= (72/75) - (35/75)
= 37/75
4) 11/80 - 11/90
= (99/720) - (88/720)
= 11/720
5) 2/5 * 3/7
= 6/35
6) 3/5 * 2/27
= 6/135
= 2/45
7) 15/16 * 8/9
= 120/144
= 5/6
8) 5 * 2/11
= 10/11