Step-by-step explanation:
[tex] \frac{21}{27} = \frac{x}{18} \\ x \times 27 = 21 \times 18 \\ x = \frac{21 \times18 }{27} \\ x= \frac{21 \times 2}{3} \\ x = 7 \times 2 \\ x= 14[/tex]
