Add 40/28 and 70/42
1st number: 1 12/28, 2nd number: 1 28/42
40/28 + 70/42 is 65/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
40/28 = 40 × 3/28 × 3 = 120/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
70/42 = 70 × 2/42 × 2 = 140/84 - Add the two like fractions:
120/84 + 140/84 = 120 + 140/84 = 260/84 - 260/84 simplified gives 65/21
- So, 40/28 + 70/42 = 65/21
In mixed form: 32/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/28+70/42 40/56+70/42 40/28+70/84 40/84+70/42