Add 7/81 and 4/30
7/81 + 4/30 is 89/405.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 30 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 81 × 10 = 810,
7/81 = 7 × 10/81 × 10 = 70/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
4/30 = 4 × 27/30 × 27 = 108/810 - Add the two like fractions:
70/810 + 108/810 = 70 + 108/810 = 178/810 - 178/810 simplified gives 89/405
- So, 7/81 + 4/30 = 89/405
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/81+4/30 7/81+8/30 7/81+4/60 21/81+4/30 7/81+12/30 7/81+4/90 35/81+4/30 7/81+20/30 49/81+4/30 7/81+28/30