Add 1/7 and 12/40
1/7 + 12/40 is 31/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
1/7 = 1 × 40/7 × 40 = 40/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
12/40 = 12 × 7/40 × 7 = 84/280 - Add the two like fractions:
40/280 + 84/280 = 40 + 84/280 = 124/280 - 124/280 simplified gives 31/70
- So, 1/7 + 12/40 = 31/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/7+12/40 1/7+24/40 1/14+12/40 1/7+12/80 3/7+12/40 1/7+36/40 1/21+12/40 5/7+12/40 1/7+60/40 1/35+12/40 1/7+84/40 1/49+12/40