The ratio of quarters to dimes in a coin collection is 5:3. You add the same number of new quarters as dimes to the collection. Is the ratio of quarters to dimes still 5:3?
Let's do it this way - let's start with 5 Quarters and 3 Dimes. I'll write it this way:
and now we add some coins. I'll add 15 to each pile, which gives us:
And so no, the ratio didn't stay the same: