Subtract 7/45 from 63/42
1st number: 1 21/42, 2nd number: 7/45
63/42 - 7/45 is 121/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
63/42 = 63 × 15/42 × 15 = 945/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
7/45 = 7 × 14/45 × 14 = 98/630 - Subtract the two like fractions:
945/630 - 98/630 = 945 - 98/630 = 847/630 - After reducing the fraction, the answer is 121/90
- In mixed form: 131/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42-14/45 63/84-7/45 63/42-7/90 63/42-21/45 63/42-35/45 63/42-49/45