Add 9/28 and 70/40
1st number: 9/28, 2nd number: 1 30/40
9/28 + 70/40 is 29/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
9/28 = 9 × 10/28 × 10 = 90/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
70/40 = 70 × 7/40 × 7 = 490/280 - Add the two like fractions:
90/280 + 490/280 = 90 + 490/280 = 580/280 - 580/280 simplified gives 29/14
- So, 9/28 + 70/40 = 29/14
In mixed form: 21/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/28+70/40 9/56+70/40 9/28+70/80 27/28+70/40 9/84+70/40 45/28+70/40 63/28+70/40