Subtract 45/30 from 12/7
1st number: 1 5/7, 2nd number: 1 15/30
12/7 - 45/30 is 3/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
12/7 = 12 × 30/7 × 30 = 360/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
45/30 = 45 × 7/30 × 7 = 315/210 - Subtract the two like fractions:
360/210 - 315/210 = 360 - 315/210 = 45/210 - After reducing the fraction, the answer is 3/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/7-45/30 12/7-90/30 12/14-45/30 12/7-45/60 36/7-45/30 12/21-45/30 12/7-45/90 60/7-45/30 12/35-45/30 84/7-45/30 12/49-45/30