17. scrie cu cifre numărut
a) trei intregi si doua septimi.
b) zece intregi şi opt unsprezecimi:
c) o sută doi intregi şi două sutimi:
douăzeci şi trei întregi si trei douăsprezecimi.
plz ma ajutați urgent

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.