Subtract 30/9 from 12/45
1st number: 12/45, 2nd number: 3 3/9
12/45 - 30/9 is -46/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 9 is 45
Next, find the equivalent fraction of both fractional numbers with denominator 45 - For the 1st fraction, since 45 × 1 = 45,
12/45 = 12 × 1/45 × 1 = 12/45 - Likewise, for the 2nd fraction, since 9 × 5 = 45,
30/9 = 30 × 5/9 × 5 = 150/45 - Subtract the two like fractions:
12/45 - 150/45 = 12 - 150/45 = -138/45 - After reducing the fraction, the answer is -46/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45-30/9 12/45-60/9 12/90-30/9 12/45-30/18 36/45-30/9 12/45-90/9 12/45-30/27 60/45-30/9 12/45-30/45 84/45-30/9 12/45-30/63