Eighth-graders 66654

The number of eighth graders in primary school is 80 percent of the number of ninth graders. There are 54 eighths and ninths. How many ninth-graders go to this school?

Correct answer:

b =  30

Step-by-step explanation:

q=80%=10080=54=0.8  a=q b a+b=54 a=0.8 b a+b=54  a0.8b=0 a+b=54  Row2Row1Row2 a0.8b=0 1.8b=54  b=1.854=30 a=0+0.8b=0+0.8 30=24  a=24 b=30



Did you find an error or inaccuracy? Feel free to write us. Thank you!







Tips for related online calculators
Our percentage calculator will help you quickly and easily solve a variety of common percentage-related problems.
Do you have a linear equation or system of equations and are looking for its solution? Or do you have a quadratic equation?

You need to know the following knowledge to solve this word math problem:

Related math problems and questions: