Subtract 42/84 from 15/4
1st number: 3 3/4, 2nd number: 42/84
15/4 - 42/84 is 13/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
15/4 = 15 × 21/4 × 21 = 315/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
42/84 = 42 × 1/84 × 1 = 42/84 - Subtract the two like fractions:
315/84 - 42/84 = 315 - 42/84 = 273/84 - After reducing the fraction, the answer is 13/4
- In mixed form: 31/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/4-42/84 15/8-42/84 45/4-42/84 15/12-42/84 75/4-42/84 15/20-42/84 15/28-42/84