Subtract 9/42 from 70/18
1st number: 3 16/18, 2nd number: 9/42
70/18 - 9/42 is 463/126.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
9/42 = 9 × 3/42 × 3 = 27/126 - Subtract the two like fractions:
490/126 - 27/126 = 490 - 27/126 = 463/126 - In mixed form: 385/126
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18-18/42 70/36-9/42 70/18-9/84 70/18-27/42 70/54-9/42 70/18-45/42 70/90-9/42 70/18-63/42