Subtract 49/90 from 12/63
12/63 - 49/90 is -223/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
12/63 = 12 × 10/63 × 10 = 120/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
49/90 = 49 × 7/90 × 7 = 343/630 - Subtract the two like fractions:
120/630 - 343/630 = 120 - 343/630 = -223/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63-49/90 12/63-98/90 36/63-49/90 60/63-49/90 84/63-49/90