Subtract 7/42 from 45/40
1st number: 1 5/40, 2nd number: 7/42
45/40 - 7/42 is 23/24.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
45/40 = 45 × 21/40 × 21 = 945/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
7/42 = 7 × 20/42 × 20 = 140/840 - Subtract the two like fractions:
945/840 - 140/840 = 945 - 140/840 = 805/840 - After reducing the fraction, the answer is 23/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-7/42 45/40-14/42 45/80-7/42 45/40-7/84 45/40-21/42 45/40-35/42 45/40-49/42