Answer: A
48+ 36 = 84
84/4 = 21 groups
there are 21 groups of 4 balloons
Yes it is yep correct 1000% 10000000000000%
solving
we get 
Step-by-step explanation:
We need to solve the following expression:

Solving:

So, solving
we get 
Keywords: Fractions
Learn more about fractions at:
#learnwithBrainly
The percent of increase is 20%.
In order to solve this problem you have to solve this equation:
18-15/15
3/15
0.2 = 20%