Subtract 81/49 from 90/28
1st number: 3 6/28, 2nd number: 1 32/49
90/28 - 81/49 is 153/98.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 49 is 196
Next, find the equivalent fraction of both fractional numbers with denominator 196 - For the 1st fraction, since 28 × 7 = 196,
90/28 = 90 × 7/28 × 7 = 630/196 - Likewise, for the 2nd fraction, since 49 × 4 = 196,
81/49 = 81 × 4/49 × 4 = 324/196 - Subtract the two like fractions:
630/196 - 324/196 = 630 - 324/196 = 306/196 - After reducing the fraction, the answer is 153/98
- In mixed form: 155/98
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56-81/49 90/28-81/98 90/84-81/49