Add 70/40 and 40/70
1st number: 1 30/40, 2nd number: 40/70
70/40 + 40/70 is 65/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
70/40 = 70 × 7/40 × 7 = 490/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
40/70 = 40 × 4/70 × 4 = 160/280 - Add the two like fractions:
490/280 + 160/280 = 490 + 160/280 = 650/280 - 650/280 simplified gives 65/28
- So, 70/40 + 40/70 = 65/28
In mixed form: 29/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/40+80/70 70/80+40/70