Subtract 60/90 from 12/7
1st number: 1 5/7, 2nd number: 60/90
12/7 - 60/90 is 22/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 7 × 90 = 630,
12/7 = 12 × 90/7 × 90 = 1080/630 - Likewise, for the 2nd fraction, since 90 × 7 = 630,
60/90 = 60 × 7/90 × 7 = 420/630 - Subtract the two like fractions:
1080/630 - 420/630 = 1080 - 420/630 = 660/630 - After reducing the fraction, the answer is 22/21
- In mixed form: 11/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7-60/90 12/14-60/90 36/7-60/90 12/21-60/90 60/7-60/90 12/35-60/90 84/7-60/90 12/49-60/90