Rogelio found a cookie recipe that requires cup of sugar and  cups of flour.

He used cups of flour.

Find how many cups of sugar would he need.

Let be the cups of sugar needed for cups of flour.

            (Original propotion)

            (Cross product)

            (Simplify)

                   (Multiply)

                 (write as mixed fraction)

So, cups of sugar would be needed for cups of flour.

cups of sugar would be needed for cups of flour.