Subtract 45/63 from 3/7
3/7 - 45/63 is -2/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 7 × 9 = 63,
3/7 = 3 × 9/7 × 9 = 27/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
45/63 = 45 × 1/63 × 1 = 45/63 - Subtract the two like fractions:
27/63 - 45/63 = 27 - 45/63 = -18/63 - After reducing the fraction, the answer is -2/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/7-45/63 3/7-90/63 3/14-45/63 9/7-45/63 3/21-45/63 15/7-45/63 3/35-45/63 21/7-45/63 3/49-45/63