Subtract 70/18 from 30/7
1st number: 4 2/7, 2nd number: 3 16/18
30/7 - 70/18 is 25/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 7 × 18 = 126,
30/7 = 30 × 18/7 × 18 = 540/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126 - Subtract the two like fractions:
540/126 - 490/126 = 540 - 490/126 = 50/126 - After reducing the fraction, the answer is 25/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/7-70/18 30/14-70/18 30/7-70/36 90/7-70/18 30/21-70/18 30/7-70/54 30/35-70/18 30/7-70/90 30/49-70/18