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)
$\frac{2}{y} = \frac{0.25}{0.75}$
multiply cross
$0.25*y = 2*0.75$
$0.25y = 1.5$
$y = \frac{1.5}{0.25}$
$\boxed{y = 6\:pencils}$

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

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