algebra
posted by Sandra .
Build each rational expression into an equivalent rational
expression with the indicated denominator
(7yt)/(3x) =(?)/(18xyt)

Start by dividing 18xyt by 3x to find the necessary multiplication to reach the new denominator.
18xyt / 3x = 6yt
Now multiply (7yt)/(3x) by (6yt)/(6yt)
= (42y^2t^2)/(18xyt)