Subtract 12/70 from 12/42
12/42 - 12/70 is 4/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
12/42 = 12 × 5/42 × 5 = 60/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
12/70 = 12 × 3/70 × 3 = 36/210 - Subtract the two like fractions:
60/210 - 36/210 = 60 - 36/210 = 24/210 - After reducing the fraction, the answer is 4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/42-12/70 12/42-24/70 12/84-12/70 36/42-12/70 12/42-36/70 60/42-12/70 12/42-60/70 84/42-12/70 12/42-84/70