Subtract 40/42 from 40/5
1st number: 8 0/5, 2nd number: 40/42
40/5 - 40/42 is 148/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 5 × 42 = 210,
40/5 = 40 × 42/5 × 42 = 1680/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Subtract the two like fractions:
1680/210 - 200/210 = 1680 - 200/210 = 1480/210 - After reducing the fraction, the answer is 148/21
- In mixed form: 71/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/5-40/42 40/5-80/42 40/10-40/42 40/5-40/84 40/15-40/42 40/25-40/42 40/35-40/42