Subtract 12/40 from 70/42
1st number: 1 28/42, 2nd number: 12/40
70/42 - 12/40 is 41/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
70/42 = 70 × 20/42 × 20 = 1400/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
12/40 = 12 × 21/40 × 21 = 252/840 - Subtract the two like fractions:
1400/840 - 252/840 = 1400 - 252/840 = 1148/840 - After reducing the fraction, the answer is 41/30
- In mixed form: 111/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42-24/40 70/84-12/40 70/42-12/80 70/42-36/40 70/42-60/40 70/42-84/40