Question

Check whether the following numbers are in proportion or not

1)½,1/5,1/6,1/15

Answer 1

Let
1/2=a
1/5=b
1/6=c
1/15=d
According to proportional property:
a*d=b*c
1/2*1/15=1/5*1/6
1/30=1/30
.
. . They are in proportion