Question

When we have a proportion a/b = c/d, we can rewrite it as ad = bc. We _ _ it. (2 words)

Answer 1

'We cross multiplied it'.

Explanation:

Lets first understand our proportion and re write in correct Fraction form as:

`(a)/(b)=(c)/(d)` Eqn(1).

where:

`a` and
`c` are the Numerators

`b` and
`d` are the Denominators

Now the question sais that Eqn(1). can be written as

`ad=bc`

This is true since here:

'We cross multiplied it'.

Cross Multiplication is used when we have equations of the form Eqn(1) where there is one fraction on the left hand side and one fraction on the right hand side, so that the Numerator of the left hand side is multiplied with the Denominator of the right hand side and similarly the Denominator of the left hand side is multiplied with the Numerator of the right hand side (like a diagonal multiplication).