Subtract 24/7 from 30/90
1st number: 30/90, 2nd number: 3 3/7
30/90 - 24/7 is -65/21.
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,
30/90 = 30 × 7/90 × 7 = 210/630 - Likewise, for the 2nd fraction, since 7 × 90 = 630,
24/7 = 24 × 90/7 × 90 = 2160/630 - Subtract the two like fractions:
210/630 - 2160/630 = 210 - 2160/630 = -1950/630 - After reducing the fraction, the answer is -65/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/90-24/7 30/90-48/7 30/90-24/14 30/90-72/7 30/90-24/21 30/90-24/35 30/90-24/49