Subtract 72/8 from 9/4
1st number: 2 1/4, 2nd number: 9 0/8
9/4 - 72/8 is -27/4.
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,
9/4 = 9 × 2/4 × 2 = 18/8 - Likewise, for the 2nd fraction, since 8 × 1 = 8,
72/8 = 72 × 1/8 × 1 = 72/8 - Subtract the two like fractions:
18/8 - 72/8 = 18 - 72/8 = -54/8 - After reducing the fraction, the answer is -27/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/4-72/8 9/8-72/8 9/4-72/16 27/4-72/8 9/12-72/8 9/4-72/24 45/4-72/8 9/20-72/8 9/4-72/40 63/4-72/8 9/28-72/8 9/4-72/56