Subtract 50/90 from 18/7
1st number: 2 4/7, 2nd number: 50/90
18/7 - 50/90 is 127/63.
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,
18/7 = 18 × 90/7 × 90 = 1620/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
50/90 = 50 × 7/90 × 7 = 350/630 - Subtract the two like fractions:
1620/630 - 350/630 = 1620 - 350/630 = 1270/630 - After reducing the fraction, the answer is 127/63
- In mixed form: 21/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7-50/90 18/14-50/90 54/7-50/90 18/21-50/90 90/7-50/90 18/35-50/90 18/49-50/90