Add 18/40 and 49/70
18/40 + 49/70 is 23/20.
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,
18/40 = 18 × 7/40 × 7 = 126/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
49/70 = 49 × 4/70 × 4 = 196/280 - Add the two like fractions:
126/280 + 196/280 = 126 + 196/280 = 322/280 - 322/280 simplified gives 23/20
- So, 18/40 + 49/70 = 23/20
In mixed form: 13/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/40+49/70 18/40+98/70 18/80+49/70 54/40+49/70 90/40+49/70