Subtract 8/42 from 70/30
1st number: 2 10/30, 2nd number: 8/42
70/30 - 8/42 is 15/7.
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,
70/30 = 70 × 7/30 × 7 = 490/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
8/42 = 8 × 5/42 × 5 = 40/210 - Subtract the two like fractions:
490/210 - 40/210 = 490 - 40/210 = 450/210 - After reducing the fraction, the answer is 15/7
- In mixed form: 21/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/30-16/42 70/60-8/42 70/30-8/84 70/30-24/42 70/90-8/42 70/30-40/42 70/30-56/42