Subtract 49/40 from 42/2
1st number: 21 0/2, 2nd number: 1 9/40
42/2 - 49/40 is 791/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 2 × 20 = 40,
42/2 = 42 × 20/2 × 20 = 840/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
49/40 = 49 × 1/40 × 1 = 49/40 - Subtract the two like fractions:
840/40 - 49/40 = 840 - 49/40 = 791/40 - In mixed form: 1931/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-49/40 42/2-98/40 42/4-49/40 42/2-49/80 42/6-49/40 42/10-49/40 42/14-49/40