First, I know that for 2 cups of raisins for every 9 cups of trail mix and I am going to divide, 9÷2 and got 4.5 so for every cup of raisins, I need to multiply it by 4.5 to get how much trail mix I had in total so I need to multiply 12× 4.5. to get my answer so 12×4.5=54 so I had 54 cups of trail mix.
So ratio si 2 to 9 or 2:9 so 12 cups of rasins to x cups of trail mix ratio is 12 to x or 12:x
it has to be the same ratio so makek fractions and 2/9=12/x solve for x mulitply both sides by x 2x/9=12 multiply both sides by 9 2x=108 divide by 2 x=54 answer is 54 cups of trail mix