Rewrite each as a multiplication problem
12 2/3 divided by 9 1/2

Write the rational number in lowest terms 99/-15

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.