Subtract 40/42 from 70/10
1st number: 7 0/10, 2nd number: 40/42
70/10 - 40/42 is 127/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
70/10 = 70 × 21/10 × 21 = 1470/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Subtract the two like fractions:
1470/210 - 200/210 = 1470 - 200/210 = 1270/210 - After reducing the fraction, the answer is 127/21
- In mixed form: 61/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/10-80/42 70/20-40/42 70/10-40/84 70/30-40/42 70/50-40/42