Mr. Sahil Income = 16800
Mrs. Sahil income = 10500
1) Ratio of Mr.Sahil' income to Mrs. Sahil's income = 16800/10500 = 168/105
168 and 105 can be divided by 3
so 168/3=56 and 105/3=35
so the ratio becomes 56/35
2) Ratio of Mrs. Sahil to Mr. Sahil=reverse of the above =35/56
3)Ratio of Mr.Sahil income to total income
total income=16800+10500=27300
ratio=16800/27300=168/273
like 168, 273 can be divided by
273/3=91
so ratio becomes 56/91