First, compare the statements
0.75=1 cupcake
14.25=Y cupcakes
I represented the unknown with Y.
Next, cross and multiply. 14.25 will multiply 1 to give 14.25 and 0.75 will multiply Y to give 0.75Y. That will be;
0.75Y=14.25
Divide both sides by 0.75
Y=14.25/0.75
Y=19
She can make 19 cupcakes. Hope that helped. Have a nice day