Subtract 42/7 from 63/20
1st number: 3 3/20, 2nd number: 6 0/7
63/20 - 42/7 is -57/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
63/20 = 63 × 7/20 × 7 = 441/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
42/7 = 42 × 20/7 × 20 = 840/140 - Subtract the two like fractions:
441/140 - 840/140 = 441 - 840/140 = -399/140 - After reducing the fraction, the answer is -57/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/20-84/7 63/40-42/7 63/20-42/14 63/60-42/7 63/20-42/21 63/20-42/35 63/20-42/49