Add 7/45 and 4/81
7/45 + 4/81 is 83/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 81 is 405
Next, find the equivalent fraction of both fractional numbers with denominator 405 - For the 1st fraction, since 45 × 9 = 405,
7/45 = 7 × 9/45 × 9 = 63/405 - Likewise, for the 2nd fraction, since 81 × 5 = 405,
4/81 = 4 × 5/81 × 5 = 20/405 - Add the two like fractions:
63/405 + 20/405 = 63 + 20/405 = 83/405 - So, 7/45 + 4/81 = 83/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45+4/81 7/45+8/81 7/90+4/81 21/45+4/81 7/45+12/81 35/45+4/81 7/45+20/81 49/45+4/81 7/45+28/81