4 divided by 7? Urgent! Urgent!
4 divided by 7 = 4 out of 70 = 2 out of 35
What's the correct rate of Xiaoming's problem? Take () as unit 1, () divided by () = ()
What's the correct rate of Xiaoming's questions? Take (total number of questions) as unit 1, (number of correct questions) divided by (total number of questions) = (correct rate)
What's the solution of 1 divided by (4 / 5 times a few - one fifth) = 3
2/3
Let this number be x, then:
1/(4x/5-1/5)=3
4x/5-1/5=1/3
(4x-1)/5=1/3
4x-1=5/3
4x=5/3+1
4x=8/3
x=2/3