The common denominator in this problem
4 6/7 +7 3/14=

Step-by-step explanation:

We have,

To find, the common denominator of = ?

∴

=

Taking the common as , we get

=

The denominator = 7

∴  The common denominator of = 7

Hence, the common denominator of = 7

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

10

step-by-step explanation:

7+3=10