Add 42/81 and 5/30
42/81 + 5/30 is 37/54.
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,
42/81 = 42 × 10/81 × 10 = 420/810 - Likewise, for the 2nd fraction, since 30 × 27 = 810,
5/30 = 5 × 27/30 × 27 = 135/810 - Add the two like fractions:
420/810 + 135/810 = 420 + 135/810 = 555/810 - 555/810 simplified gives 37/54
- So, 42/81 + 5/30 = 37/54
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/81+5/30 42/81+10/30 42/81+5/60 42/81+15/30 42/81+5/90 42/81+25/30 42/81+35/30