Add 9/40 and 7/70
9/40 + 7/70 is 13/40.
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,
9/40 = 9 × 7/40 × 7 = 63/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
7/70 = 7 × 4/70 × 4 = 28/280 - Add the two like fractions:
63/280 + 28/280 = 63 + 28/280 = 91/280 - 91/280 simplified gives 13/40
- So, 9/40 + 7/70 = 13/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/40+7/70 9/40+14/70 9/80+7/70 27/40+7/70 9/40+21/70 45/40+7/70 9/40+35/70 63/40+7/70 9/40+49/70