You first multiply across [tex] \frac{2}{3} [/tex] and [tex] \frac{18}{1} [/tex] = [tex] \frac{36}{3} [/tex]. Then you divide the numerator(the top) by the denominator(the bottom) which is [tex] \frac{36}{3} [/tex]=[tex] \frac{12}{1} or [/tex] just 12
