14 is what % of 80? Math Questions.?

Question

I have a few pre-algebra questions that i need help with:

14 is what % of 80?

16 is 30% of what?

Solving 1 step equations:

5x+15x=20

x/23= 4

What is a least common multiple?

Thank you in advance!

P.S. Can you please explain what you did to solve each equation?

Answer 1

20x=20x

x=1

x= 4 times 23

Answer 2

Restate the problem this way to make it easier to understand: 14 is to 80 as what is to 100?

Now state the same question with math symbols: 14/80 = ?/100

Then solve the problem by multiplying both sides of the equation by 100:

(14X100)/80 = 17.5

Answer 3

is over of = 14/80 X 100= 17.5

16/? X 30/100 (cross multiply) = 53 1/3

20x=20 (combine terms then divide by 20)

x=1

multiply both sides by 23

x=92