Fractions and triangles

This task is about working out the fraction of shapes that is shaded.

Question

4 pairs of triangle - 2 triangles shaded
 
a)  What fraction of the triangles above is shaded?
    • 12

    • 13

    • 26

    • 14

Question

4 pairs of triangle - 3 triangles shaded
 
b)  One more triangle was shaded. What fraction is shaded now?
    • 38

    • 34

    • 36

    • 33

Question

4 pairs of triangle - 4 triangles shaded
 
c)  Another triangle was shaded. What fraction is unshaded now?
    • 18

    • 13

    • 14

    • 12