Answer: 30 grams
Explanation:
Use a proportion to solve this, 10:3 ratio can be converted to the fraction
. That would equal
.
To find the equal fraction, you have to cross multiply both values, meaning we multiply the numbers diagonal from each other. So set the equation to
·

You should get 10g=300. Now you just have to divide 10 from both sides, which will give you g=30
To check your answer divide 10 & 3 and 100 & g.
If you divide the pair of numbers you should get 0.3 for both, meaning the answers are equal.
Hope that helped a lot.
:)