You can put this solution on YOUR website!
if she uses cups of flour to bake muffins, with cup she can bake muffins
if she has cups she can bake muffins
or this way:
(1) Don't panic.
It is as simple as 2x2 = 4.
(2) 15 is 2.5 times as much as 6.
Hence, with 15 cups of flour she can make 40 * 2.5 = 100 muffins. ANSWER