Add 1/40 and 42/49
1/40 + 42/49 is 247/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 49 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 40 × 49 = 1960,
1/40 = 1 × 49/40 × 49 = 49/1960 - Likewise, for the 2nd fraction, since 49 × 40 = 1960,
42/49 = 42 × 40/49 × 40 = 1680/1960 - Add the two like fractions:
49/1960 + 1680/1960 = 49 + 1680/1960 = 1729/1960 - 1729/1960 simplified gives 247/280
- So, 1/40 + 42/49 = 247/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/40+42/49 1/40+84/49 1/80+42/49 1/40+42/98 3/40+42/49 5/40+42/49 7/40+42/49