Add 8/40 and 81/70
1st number: 8/40, 2nd number: 1 11/70
8/40 + 81/70 is 19/14.
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,
8/40 = 8 × 7/40 × 7 = 56/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
81/70 = 81 × 4/70 × 4 = 324/280 - Add the two like fractions:
56/280 + 324/280 = 56 + 324/280 = 380/280 - 380/280 simplified gives 19/14
- So, 8/40 + 81/70 = 19/14
In mixed form: 15/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/40+81/70 8/80+81/70 24/40+81/70 56/40+81/70