The number of the first team is 9 / 10 of the number of the second team, and the number of the second team is 2 / 3 and 1 / 3 of the number of the third team. What percentage of the total number of the three teams?

The number of the first team is 9 / 10 of the number of the second team, and the number of the second team is 2 / 3 and 1 / 3 of the number of the third team. What percentage of the total number of the three teams?

Team 1 9 / 10 ÷ (9 / 10 + 1 + 3 / 7)
=9/10÷163/70
=63/163
Team 2 63 / 163 △ 9 / 10 = 70 / 163
Three teams 70 / 163 △ 7 / 3 = 30 / 163