Question

Divide 60 pens in the ratio of 1:4

Answer 1

Add 1and 4 that equals to 5
1+4=5

now divide it by total number of pens.
60/5 =12

now multiply 12 by ratio given above.
1 ✖ 12 = 12
4 ✖ 12 = 48

1:4 = 12:48

hope it helps..