Subtract 1/30 from 6/42
6/42 - 1/30 is 23/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
6/42 = 6 × 5/42 × 5 = 30/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Subtract the two like fractions:
30/210 - 7/210 = 30 - 7/210 = 23/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 12/42-1/30 6/42-2/30 6/84-1/30 6/42-1/60 18/42-1/30 6/42-3/30 6/42-1/90 30/42-1/30 6/42-5/30 6/42-7/30