How do i show equivalence of the fractions? do i divide, cross multiple, etc.

Could answer every question with steps

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Which of the following values cannot be probabilities? 0.08, 5 divided by 3, startroot 2 endroot, negative 0.59, 1, 0, 1.44, 3 divided by 5 select all the values that cannot be probabilities. a. five thirds b. 1.44 c. 1 d. startroot 2 endroot e. three fifths f. 0.08 g. 0 h. negative 0.59