Subtract 45/30 from 10/28
1st number: 10/28, 2nd number: 1 15/30
10/28 - 45/30 is -8/7.
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,
10/28 = 10 × 15/28 × 15 = 150/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
45/30 = 45 × 14/30 × 14 = 630/420 - Subtract the two like fractions:
150/420 - 630/420 = 150 - 630/420 = -480/420 - After reducing the fraction, the answer is -8/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/28-45/30 10/28-90/30 10/56-45/30 10/28-45/60 30/28-45/30 10/84-45/30 10/28-45/90 50/28-45/30 70/28-45/30