Subtract 45/15 from 42/2
1st number: 21 0/2, 2nd number: 3 0/15
42/2 - 45/15 is 18/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 2 × 15 = 30,
42/2 = 42 × 15/2 × 15 = 630/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
45/15 = 45 × 2/15 × 2 = 90/30 - Subtract the two like fractions:
630/30 - 90/30 = 630 - 90/30 = 540/30 - After reducing the fraction, the answer is 18/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2-45/15 42/2-90/15 42/4-45/15 42/2-45/30 42/6-45/15 42/10-45/15 42/2-45/75 42/14-45/15