Subtract 20/42 from 30/24
1st number: 1 6/24, 2nd number: 20/42
30/24 - 20/42 is 65/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 24 × 7 = 168,
30/24 = 30 × 7/24 × 7 = 210/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
20/42 = 20 × 4/42 × 4 = 80/168 - Subtract the two like fractions:
210/168 - 80/168 = 210 - 80/168 = 130/168 - After reducing the fraction, the answer is 65/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/24-20/42 30/24-40/42 30/48-20/42 30/24-20/84 90/24-20/42 30/24-60/42 30/72-20/42