Subtract 36/21 from 10/90
1st number: 10/90, 2nd number: 1 15/21
10/90 - 36/21 is -101/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 21 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
10/90 = 10 × 7/90 × 7 = 70/630 - Likewise, for the 2nd fraction, since 21 × 30 = 630,
36/21 = 36 × 30/21 × 30 = 1080/630 - Subtract the two like fractions:
70/630 - 1080/630 = 70 - 1080/630 = -1010/630 - After reducing the fraction, the answer is -101/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/90-36/21 10/90-72/21 10/90-36/42 30/90-36/21 10/90-36/63 50/90-36/21 70/90-36/21