Answer :
2 1/2 * 5 = 12 1/2 cups of flour are needed to make 5 batches
5/2 * 5/1=25/2 or 12 1/2 cups
the simplest way is to convert 2 1/2 to decimal 2,5 then multiply by 5
2.5 x 5=12.5 or 12 1/2 cups of flour
2 1/2 * 5 = 12 1/2 cups of flour are needed to make 5 batches
5/2 * 5/1=25/2 or 12 1/2 cups