Subtract 80/30 from 3/42
1st number: 3/42, 2nd number: 2 20/30
3/42 - 80/30 is -109/42.
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,
3/42 = 3 × 5/42 × 5 = 15/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
80/30 = 80 × 7/30 × 7 = 560/210 - Subtract the two like fractions:
15/210 - 560/210 = 15 - 560/210 = -545/210 - After reducing the fraction, the answer is -109/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/42-80/30 3/84-80/30 3/42-80/60 9/42-80/30 3/42-80/90 15/42-80/30 21/42-80/30