Subtract 3/40 from 42/2
1st number: 21 0/2, 2nd number: 3/40
42/2 - 3/40 is 837/40.
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,
3/40 = 3 × 1/40 × 1 = 3/40 - Subtract the two like fractions:
840/40 - 3/40 = 840 - 3/40 = 837/40 - In mixed form: 2037/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-3/40 42/2-6/40 42/4-3/40 42/2-3/80 42/2-9/40 42/6-3/40 42/2-15/40 42/10-3/40 42/2-21/40 42/14-3/40