I need help with subtracting fractions I have no idea if I'm doing it right.
Please help.
3/7-9/21
Fist you find a least common denominator, right?
So it's 21
Do you then multiply 3/7 to 3/3 so it will be 9/21
So, 9/21 - 9/21 = 1
I mean 0
You are correct! :-)
Yaay, thank you!
Can you check this one also!
2/3-1/16
For the LCD I got 96
So I multiplied 32/32 • 2/3 & 16/16 • 1/6
= 64/96 - 16/96
= 48/96
But I need to simplify that so
Then I divided 48/96 by 16/16
=3/6 divided by 3/3 = 1/3
To start, 48/96 = 1/2
The lowest common denominator is 48
2/3 = 32/48
1/16 = 3/48
32/48 - 3/48 = 29/48
To subtract fractions, you are on the right track! Here's a step-by-step guide on how to subtract fractions correctly:
1. Determine the least common denominator (LCD) of the fractions. In this case, the LCD is 21 because both 7 and 21 can be evenly divided by 7.
2. To make the denominators in both fractions equal to the LCD, you will need to multiply both the numerator and denominator of each fraction by the same value.
For the first fraction, 3/7, multiply both the numerator and denominator by 3 to get 9/21.
For the second fraction, 9/21, there is no need to change anything since the denominator is already 21.
3. Now that both fractions have the same denominator, you can subtract their numerators.
9/21 - 9/21 = (9 - 9) / 21 = 0/21.
The result is 0/21, but 0/21 can be simplified to just 0 because any number divided by 21 will always be zero.