Subtract 32/7 from 15/90
1st number: 15/90, 2nd number: 4 4/7
15/90 - 32/7 is -185/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 7 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
15/90 = 15 × 7/90 × 7 = 105/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
32/7 = 32 × 90/7 × 90 = 2880/630 - Subtract the two like fractions:
105/630 - 2880/630 = 105 - 2880/630 = -2775/630 - After reducing the fraction, the answer is -185/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/90-32/7 15/90-64/7 15/90-32/14 45/90-32/7 15/90-96/7 15/90-32/21 75/90-32/7 15/90-32/35 15/90-32/49