Add 56/42 and 70/40
1st number: 1 14/42, 2nd number: 1 30/40
56/42 + 70/40 is 37/12.
Steps for adding 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,
56/42 = 56 × 20/42 × 20 = 1120/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
70/40 = 70 × 21/40 × 21 = 1470/840 - Add the two like fractions:
1120/840 + 1470/840 = 1120 + 1470/840 = 2590/840 - 2590/840 simplified gives 37/12
- So, 56/42 + 70/40 = 37/12
In mixed form: 31/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/84+70/40 56/42+70/80