Subtract 15/90 from 48/21
1st number: 2 6/21, 2nd number: 15/90
48/21 - 15/90 is 89/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 21 × 30 = 630,
48/21 = 48 × 30/21 × 30 = 1440/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Subtract the two like fractions:
1440/630 - 105/630 = 1440 - 105/630 = 1335/630 - After reducing the fraction, the answer is 89/42
- In mixed form: 25/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/21-15/90 48/21-30/90 48/42-15/90 48/21-45/90 48/63-15/90 48/21-75/90