Karen collects local and foreign coins.1/4 of her coins are foreign coins .2/9 of the foreign coins are Australia coins.what fraction of the coins are non Australia foreign coins?
clearly this is the unit on addition of fractions, right?
To find the fraction of the coins that are non-Australia foreign coins, we first need to determine the fraction of coins that are Australia coins.
Given that 2/9 of the foreign coins are Australia coins, we can represent this fraction as 2/9.
Now, let's find the total fraction of foreign coins. We know that 1/4 of Karen's coins are foreign, so we can represent this fraction as 1/4.
To determine the fraction of non-Australia foreign coins, we need to subtract the fraction of Australia coins from the total fraction of foreign coins.
Fraction of non-Australia foreign coins = Total fraction of foreign coins - Fraction of Australia coins.
Fraction of non-Australia foreign coins = (1/4) - (2/9).
To compute this, we need to find a common denominator for both fractions, which in this case is 36.
(1/4) - (2/9) = (9/36) - (8/36).
We can now subtract these fractions by determining the difference of the numerators and keeping the common denominator.
(9/36) - (8/36) = 1/36.
Therefore, the fraction of non-Australia foreign coins is 1/36.