Subtract 2/40 from 45/30
1st number: 1 15/30, 2nd number: 2/40
45/30 - 2/40 is 29/20.
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,
45/30 = 45 × 4/30 × 4 = 180/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
2/40 = 2 × 3/40 × 3 = 6/120 - Subtract the two like fractions:
180/120 - 6/120 = 180 - 6/120 = 174/120 - After reducing the fraction, the answer is 29/20
- In mixed form: 19/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/30-2/40 45/30-4/40 45/60-2/40 45/30-2/80 45/30-6/40 45/90-2/40 45/30-10/40 45/30-14/40