Subtract 5/49 from 90/21
1st number: 4 6/21, 2nd number: 5/49
90/21 - 5/49 is 205/49.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 49 is 147
Next, find the equivalent fraction of both fractional numbers with denominator 147 - For the 1st fraction, since 21 × 7 = 147,
90/21 = 90 × 7/21 × 7 = 630/147 - Likewise, for the 2nd fraction, since 49 × 3 = 147,
5/49 = 5 × 3/49 × 3 = 15/147 - Subtract the two like fractions:
630/147 - 15/147 = 630 - 15/147 = 615/147 - After reducing the fraction, the answer is 205/49
- In mixed form: 49/49
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-10/49 90/42-5/49 90/21-5/98 90/21-15/49 90/63-5/49 90/21-25/49 90/21-35/49