Subtract 28/42 from 24/20
1st number: 1 4/20, 2nd number: 28/42
24/20 - 28/42 is 8/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
24/20 = 24 × 21/20 × 21 = 504/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
28/42 = 28 × 10/42 × 10 = 280/420 - Subtract the two like fractions:
504/420 - 280/420 = 504 - 280/420 = 224/420 - After reducing the fraction, the answer is 8/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/20-28/42 24/20-56/42 24/40-28/42 24/20-28/84 72/20-28/42 24/20-84/42 24/60-28/42