Subtract 12/9 from 16/30
1st number: 16/30, 2nd number: 1 3/9
16/30 - 12/9 is -4/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 30 × 3 = 90,
16/30 = 16 × 3/30 × 3 = 48/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
12/9 = 12 × 10/9 × 10 = 120/90 - Subtract the two like fractions:
48/90 - 120/90 = 48 - 120/90 = -72/90 - After reducing the fraction, the answer is -4/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/30-12/9 16/30-24/9 16/60-12/9 16/30-12/18 48/30-12/9 16/30-36/9 16/90-12/9 16/30-12/27 80/30-12/9 16/30-60/9 16/30-12/45 16/30-84/9 16/30-12/63