Subtract 18/90 from 70/7
1st number: 10 0/7, 2nd number: 18/90
70/7 - 18/90 is 49/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
70/7 = 70 × 90/7 × 90 = 6300/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
18/90 = 18 × 7/90 × 7 = 126/630 - Subtract the two like fractions:
6300/630 - 126/630 = 6300 - 126/630 = 6174/630 - After reducing the fraction, the answer is 49/5
- In mixed form: 94/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/7-36/90 70/14-18/90 70/7-54/90 70/21-18/90 70/35-18/90 70/49-18/90