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Cross canceling in dividing fractions is when you simplify the fractions by canceling out common factors in the numerators and denominators diagonally across from each other. This helps to make the division process easier and quicker. So, basically, it's like cutting out the middleman and getting straight to the point when dividing fractions.
Cross multiplication is when you multiply the denominator of a fraction by the numerator of another fraction. Before you cross multiply you want to see if you can simply the fractions.
yes
easy, just cross multiply
cross multiply and the fraction with the largest total is a greater fraction