Subtract 16/45 from 63/42
1st number: 1 21/42, 2nd number: 16/45
63/42 - 16/45 is 103/90.
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,
16/45 = 16 × 14/45 × 14 = 224/630 - Subtract the two like fractions:
945/630 - 224/630 = 945 - 224/630 = 721/630 - After reducing the fraction, the answer is 103/90
- In mixed form: 113/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/42-32/45 63/84-16/45 63/42-16/90 63/42-48/45 63/42-80/45