Subtract 30/70 from 1/28
1/28 - 30/70 is -11/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
1/28 = 1 × 5/28 × 5 = 5/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
30/70 = 30 × 2/70 × 2 = 60/140 - Subtract the two like fractions:
5/140 - 60/140 = 5 - 60/140 = -55/140 - After reducing the fraction, the answer is -11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/28-30/70 1/28-60/70 1/56-30/70 3/28-30/70 1/28-90/70 1/84-30/70 5/28-30/70 7/28-30/70