Add 81/70 and 2/40
1st number: 1 11/70, 2nd number: 2/40
81/70 + 2/40 is 169/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
81/70 = 81 × 4/70 × 4 = 324/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
2/40 = 2 × 7/40 × 7 = 14/280 - Add the two like fractions:
324/280 + 14/280 = 324 + 14/280 = 338/280 - 338/280 simplified gives 169/140
- So, 81/70 + 2/40 = 169/140
In mixed form: 129/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/70+4/40 81/70+2/80 81/70+6/40 81/70+10/40 81/70+14/40