Subtract 2/30 from 8/42
8/42 - 2/30 is 13/105.
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,
8/42 = 8 × 5/42 × 5 = 40/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
2/30 = 2 × 7/30 × 7 = 14/210 - Subtract the two like fractions:
40/210 - 14/210 = 40 - 14/210 = 26/210 - After reducing the fraction, the answer is 13/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42-2/30 8/42-4/30 8/84-2/30 8/42-2/60 24/42-2/30 8/42-6/30 8/42-2/90 40/42-2/30 8/42-10/30 56/42-2/30 8/42-14/30