Grace has 3 1/2 cups of yogurt to make smoothies. Each smoothies uses 2/5 cup of yogurt. What is the maximum number of smoothies that Grace can make with the yogurt?

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.