Rewrite 18 /5 as a mixed number.
5 1/3
5 5/3
3 3/5
3 5/3

your awnser is 3 3/5

Step-by-step explanation:

all u do is 18 divided by 5 wich gives u 3 with a leftover of 3 so that gives u 3 3/5

3 3/5

Step-by-step explanation:

You count by 5 until it wont fit in to 18 what you have left over ( 3 ) is your numerater. However many times 5 went into 18 Is your whole number.

40%

Step-by-step explanation:

lets just forget the number 70 because it wont change anything in this story problem

there must be the value 100% which equals the 70 students

the problem told that 40% of them are sixth graders while 20% are seventh and the rest are eighth so

100-(40+20)=40

if you didnt get it here another way:

40%+20%=60% which is the percentage of seventh and sixth graders together

the rest of the 100% is the eighth so you should subtract the 60% from the 100% which is "40%"