Subtract 48/42 from 20/5
1st number: 4 0/5, 2nd number: 1 6/42
20/5 - 48/42 is 20/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
20/5 = 20 × 42/5 × 42 = 840/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
48/42 = 48 × 5/42 × 5 = 240/210 - Subtract the two like fractions:
840/210 - 240/210 = 840 - 240/210 = 600/210 - After reducing the fraction, the answer is 20/7
- In mixed form: 26/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/5-48/42 20/5-96/42 20/10-48/42 20/5-48/84 60/5-48/42 20/15-48/42 20/25-48/42 20/35-48/42