Subtract 15/30 from 54/40
1st number: 1 14/40, 2nd number: 15/30
54/40 - 15/30 is 17/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
54/40 = 54 × 3/40 × 3 = 162/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
15/30 = 15 × 4/30 × 4 = 60/120 - Subtract the two like fractions:
162/120 - 60/120 = 162 - 60/120 = 102/120 - After reducing the fraction, the answer is 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/80-15/30 54/40-15/60 54/40-45/30 54/40-15/90 54/40-75/30