The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.
LCD(3/4, 1/8) = 8
Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.
(3/4×2/2)−(1/8×1/1)=?
Complete the multiplication and the equation becomes
6/8−1/8=?
The two fractions now have like denominators so you can subtract the numerators.
Answers & Comments
Answer:
Subtract 1/8 from 3/4
3
4
-
1
8
is
5
8
.
Steps for subtracting fractions
Find the least common denominator or LCM of the two denominators:
LCM of 4 and 8 is 8
Next, find the equivalent fraction of both fractional numbers with denominator 8
For the 1st fraction, since 4 × 2 = 8,
3
4
=
3 × 2
4 × 2
=
6
8
Likewise, for the 2nd fraction, since 8 × 1 = 8,
1
8
=
1 × 1
8 × 1
=
1
8
Subtract the two like fractions:
6
8
-
1
8
=
6 - 1
8
=
5
8
Answer:
5/8
The fractions have unlike denominators. First, find the Least Common Denominator and rewrite the fractions with the common denominator.
LCD(3/4, 1/8) = 8
Multiply both the numerator and denominator of each fraction by the number that makes its denominator equal the LCD. This is basically multiplying each fraction by 1.
(3/4×2/2)−(1/8×1/1)=?
Complete the multiplication and the equation becomes
6/8−1/8=?
The two fractions now have like denominators so you can subtract the numerators.
Then:
6−1/8=5/8
This fraction cannot be reduced.
Therefore:
3/4−1/8=5/8