`a, 51/100 - 17/100 = 34/100 = 17/50`
`b, 8/15 - 2/5 = 8/15 - 6/15 = 2/15`
`c, 5/ 9- 1/4 =11/36`
`d, 3 - 1/3 = 8/9`
`e, 5 - 2/5 = (25-2)/5 = 23/5`
`g, 5/9 - 3/12 = (20 - 9)/36 = 11/36`
`51/100 - 17/100 = (51-17)/100 = 34/100 = 17/50`
`8/15 - 2/5 = 8/15 - 6/15 = (8-6)/15 = 2/15`
`5/9-1/4 = 20/36 - 9/36 = (20-9)/36 = 11/36`
`3-1/3=9/3-1/3=(9-1)/3 = 8/3`
`5-2/5 = 25/5 - 2/5 = (25-2)/5 = 23/5`
`5/9 - 3/12 = 5/9 - 1/4 = 20/36 - 9/36 = (20-9)/36 = 11/36`