Add 12/40 and 7/70
12/40 + 7/70 is 2/5.
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,
12/40 = 12 × 7/40 × 7 = 84/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
7/70 = 7 × 4/70 × 4 = 28/280 - Add the two like fractions:
84/280 + 28/280 = 84 + 28/280 = 112/280 - 112/280 simplified gives 2/5
- So, 12/40 + 7/70 = 2/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/40+7/70 12/40+14/70 12/80+7/70 36/40+7/70 12/40+21/70 60/40+7/70 12/40+35/70 84/40+7/70 12/40+49/70