Cut a watermelon into 9 pieces on average, Dongdong ate 2 pieces. Mingming ate 3 pieces, and Dongdong ate what percentage of the watermelon?
Mingming 3 / 9 = 1 / 3
Dongdong 2 / 9
Six children ate 5 kg of a big watermelon. How many parts of the watermelon did each child eat? How many kg of watermelon did each child eat?
First question: 5 / 6
Second question: 6 / 5
Divide 2 watermelons equally among 5 children. How many parts of a watermelon does each child get?
2 / 5
That is, two fifths of each child's watermelon, that is, two fifths of each child's watermelon