Question

a muffin recipe calls for two fifths table spoon of vanilla extract for six muffins. aurthor is making 18 muffins. how much vanilla extract does he need?

Answer 1

1.2 
2/5=6 muffins
?/?=18 muffins

18/6=3 times as many muffins
so you need 3 times as much vanilla extract.

2/5 x 3= 1.2