Subtract 30/42 from 70/30
1st number: 2 10/30, 2nd number: 30/42
70/30 - 30/42 is 34/21.
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,
30/42 = 30 × 5/42 × 5 = 150/210 - Subtract the two like fractions:
490/210 - 150/210 = 490 - 150/210 = 340/210 - After reducing the fraction, the answer is 34/21
- In mixed form: 113/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/30-60/42 70/60-30/42 70/30-30/84 70/30-90/42 70/90-30/42