Question:

There were 90 children at the birthday party. If 3/5 of them are boys, how many were girls?

Step-by-step explanation:

1. What is asked in the problem? Answer: The number of girls at the birthday party.
2. What are the given facts? Answer: 90 - children, 3/5 - boys
3. What process will you use? Answer: Division, Multiplication, Subtraction
4. What is the number sentence? Answer: 90-3/5=N
5. Solution: Convert first the 3/5 into decimal (convert 3/5 into decimal by dividing 3 by 5), then multiply the answer by 90. 3÷5=0.6, 0.6×90=54, 54=Boys. 90-54=36-Girls
6. What is the complete answer? Complete Answer: There are 36 girls at the birthday party.

P.s. If you're not satisfied with my answer, you can visit the following links:

There were 90 children at the birthday party. if 3/5 of them were boys, how many were girls?

brainly.ph/question/5492550

brainly.ph/question/620769