Anyone? help? please?

Which is equivalent to 10/12? options: 10/18 5/6 3/12 9/11

What is the absolute value of the complex number -4-sqrt2i

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.