Subtract 70/49 from 1/90
1st number: 1/90, 2nd number: 1 21/49
1/90 - 70/49 is -893/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 49 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 90 × 49 = 4410,
1/90 = 1 × 49/90 × 49 = 49/4410 - Likewise, for the 2nd fraction, since 49 × 90 = 4410,
70/49 = 70 × 90/49 × 90 = 6300/4410 - Subtract the two like fractions:
49/4410 - 6300/4410 = 49 - 6300/4410 = -6251/4410 - After reducing the fraction, the answer is -893/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/90-70/49 1/90-70/98 3/90-70/49 5/90-70/49 7/90-70/49