Add 1/40 and 42/81
1/40 + 42/81 is 587/1080.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 81 is 3240
Next, find the equivalent fraction of both fractional numbers with denominator 3240 - For the 1st fraction, since 40 × 81 = 3240,
1/40 = 1 × 81/40 × 81 = 81/3240 - Likewise, for the 2nd fraction, since 81 × 40 = 3240,
42/81 = 42 × 40/81 × 40 = 1680/3240 - Add the two like fractions:
81/3240 + 1680/3240 = 81 + 1680/3240 = 1761/3240 - 1761/3240 simplified gives 587/1080
- So, 1/40 + 42/81 = 587/1080
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/40+42/81 1/40+84/81 1/80+42/81 3/40+42/81 5/40+42/81 7/40+42/81