1) 3 : 1
Total number of parts = 3 + 1 = 4
So 3 out of 4 parts =
And 1 out of 4 parts =
2) 2 : 3 : 4
Total number of parts = 2 + 3 + 4 = 9 parts
So 2 out of 9 parts =
3 out of 9 parts =
And 4 out of 9 parts =
3) 1 : 2 : 5
Total number of parts = 1 + 2 + 5 = 8 parts
So, 1 out of 8 parts =
2 out of 8 parts =
And 5 out of 8 parts =