Subtract 7/30 from 3/28
3/28 - 7/30 is -53/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
3/28 = 3 × 15/28 × 15 = 45/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
7/30 = 7 × 14/30 × 14 = 98/420 - Subtract the two like fractions:
45/420 - 98/420 = 45 - 98/420 = -53/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/28-7/30 3/28-14/30 3/56-7/30 3/28-7/60 9/28-7/30 3/28-21/30 3/84-7/30 3/28-7/90 15/28-7/30 3/28-35/30 21/28-7/30 3/28-49/30