2 4/5 - 3
so 3 becomes 3/1 right?
Then change 2 4/5 to 14/5 = 42/15
and 3/1 = 45/15 right?
yes so 42/15 - 45/15 = -3/15 = -1/5
yes, that's right. :)
then (42-45)/15 = -3/15 = -1/5
You could have easily done it in your head this way
2 4/5 is just 1/5 less than three
so this is really
3 - 1/5 - 3
which is
-1/5
To subtract mixed numbers, such as 2 4/5 - 3, you can follow these steps:
Step 1: Convert the whole numbers to fractions with a denominator equal to 1.
- In this case, 3 can be written as 3/1.
Step 2: Convert the mixed numbers to improper fractions.
- To convert 2 4/5 to an improper fraction, multiply the whole number (2) by the denominator (5), then add the numerator (4) to that result.
2 x 5 = 10, and 10 + 4 = 14.
So, 2 4/5 as an improper fraction is 14/5.
Step 3: Find a common denominator.
- To subtract fractions, we need a common denominator.
In this case, the denominators are already the same (5 and 1), so we can skip this step.
Step 4: Subtract the fractions.
- Subtract the numerators (top numbers) of the fractions and keep the denominator the same.
14/5 - 3/1 = (14 - 15)/5 = -1/5.
So, the result of 2 4/5 - 3 is -1/5.