Question

Lu's math score on her achievement test in seventh grade was a 650. Her math teacher told her that her test score level went up by 25% from her sixth grade test score level. What was Lu's test score level in sixth grade? Show your work.

Answer 1

`x=Lu's\ grade\ in\ sixth\ grade. \\ x* (125)/(100) =650 \\ x=650* (100)/(125) \\ x= ((650)(100))/(125) = (65000)/(125) \\ \boxed{x=520}`