Subtract 7/90 from 30/28
1st number: 1 2/28, 2nd number: 7/90
30/28 - 7/90 is 313/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 28 × 45 = 1260,
30/28 = 30 × 45/28 × 45 = 1350/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
7/90 = 7 × 14/90 × 14 = 98/1260 - Subtract the two like fractions:
1350/1260 - 98/1260 = 1350 - 98/1260 = 1252/1260 - After reducing the fraction, the answer is 313/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28-7/90 30/28-14/90 30/56-7/90 90/28-7/90 30/28-21/90 30/84-7/90 30/28-35/90 30/28-49/90