Subtract 16/40 from 10/30
10/30 - 16/40 is -1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
10/30 = 10 × 4/30 × 4 = 40/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
16/40 = 16 × 3/40 × 3 = 48/120 - Subtract the two like fractions:
40/120 - 48/120 = 40 - 48/120 = -8/120 - After reducing the fraction, the answer is -1/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/30-16/40 10/30-32/40 10/60-16/40 10/30-16/80 10/30-48/40 10/90-16/40 50/30-16/40 10/30-80/40 70/30-16/40