Subtract 4/10 from 28/42
28/42 - 4/10 is 4/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
28/42 = 28 × 5/42 × 5 = 140/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
4/10 = 4 × 21/10 × 21 = 84/210 - Subtract the two like fractions:
140/210 - 84/210 = 140 - 84/210 = 56/210 - After reducing the fraction, the answer is 4/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42-4/10 28/42-8/10 28/84-4/10 28/42-4/20 84/42-4/10 28/42-12/10 28/42-4/30 28/42-20/10 28/42-4/50 28/42-28/10 28/42-4/70