Subtract 3/42 from 4/30
4/30 - 3/42 is 13/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
4/30 = 4 × 7/30 × 7 = 28/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
3/42 = 3 × 5/42 × 5 = 15/210 - Subtract the two like fractions:
28/210 - 15/210 = 28 - 15/210 = 13/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/30-3/42 4/30-6/42 4/60-3/42 4/30-3/84 12/30-3/42 4/30-9/42 4/90-3/42 20/30-3/42 4/30-15/42 28/30-3/42 4/30-21/42