Subtract 10/30 from 12/28
12/28 - 10/30 is 2/21.
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,
12/28 = 12 × 15/28 × 15 = 180/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
10/30 = 10 × 14/30 × 14 = 140/420 - Subtract the two like fractions:
180/420 - 140/420 = 180 - 140/420 = 40/420 - After reducing the fraction, the answer is 2/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/28-10/30 12/28-20/30 12/56-10/30 12/28-10/60 36/28-10/30 12/84-10/30 12/28-10/90 60/28-10/30 12/28-50/30 84/28-10/30 12/28-70/30