Question

Roman has 2 red pencils in his backpack. if this is 25% of the total number of pencils, how many pencils are in his backpack??? PLEASE HELP!!!!!

Answer 1

Data:
If:
2 red pencils → 25% or 0.25
So:
"y" pencils → 75% or 0.75

The rule of three: (directly proportional)

`(2)/(y) = (0.25)/(0.75)`
multiply cross

`0.25*y = 2*0.75`

`0.25y = 1.5`

`y = (1.5)/(0.25)`

`\boxed{y = 6\:pencils}`

how many pencils are in his backpack?
Add the values ​​of the pencils


`\boxed{\boxed{2 + 6 = 8\:pencils}}\end{array}}\qquad\quad\checkmark`