The math club at a middle school increased from 62 students to 78 in one school year. what is the approximate percent of increase? a)3.85% b) 4.875% c) 21% d) 26%

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.