need help on this fraction equation $2/5 = 2/3 - r/5$ $$\frac{2}{5} = \frac{2}{3} - \frac{r}{5}$$
I'm trying to find $r$. Can anyone give me a step by step?

Multiply LHS by 3/3 then you are going to get (6/15)=(2/3)-(r/5)=(10-3r)/15, and by comparing numerators on both sides it follows that 6=10-3r
