Sandra nought 9 yards of ribbon. 2/3 of the ribbon was pink. How many yards of ribbon were not pink?
If 2 / 3 of the ribbon was pink, 1 / 3 of the ribbon were not pink.
1 / 3 ∙ 9 yd = 3 yd
3 yd of ribbon were not pink
1 / 3 ∙ 9 yd = 3 yd
3 yd of ribbon were not pink