Subtract 63/40 from 42/18
1st number: 2 6/18, 2nd number: 1 23/40
42/18 - 63/40 is 91/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
42/18 = 42 × 20/18 × 20 = 840/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
63/40 = 63 × 9/40 × 9 = 567/360 - Subtract the two like fractions:
840/360 - 567/360 = 840 - 567/360 = 273/360 - After reducing the fraction, the answer is 91/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18-63/40 42/36-63/40 42/18-63/80 42/54-63/40 42/90-63/40