Answer:
Original ratio Balloons at party
4 12
3 9
7 21
Explanation:
1. The best thing you can do to start the problem is add the number of balloons in the original ratio to identify that there will be 7 in the original ratio.
2. Once we know that the total balloons ratio is 7 and know that the total balloons is 21 at the party, we can deduce that there is a 7:21 ratio which we can simplify to 1:3. To check just ask what 1 times 7 and 3 times 7 is.
3. Now that we know the original ratio for the total balloons we simply multiply solid balloons by 3 and striped balloons by 3.
4. 4x3=12, 3x3=9.