Add 42/81 and 4/30
42/81 + 4/30 is 88/135.
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,
4/30 = 4 × 27/30 × 27 = 108/810 - Add the two like fractions:
420/810 + 108/810 = 420 + 108/810 = 528/810 - 528/810 simplified gives 88/135
- So, 42/81 + 4/30 = 88/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/81+4/30 42/81+8/30 42/81+4/60 42/81+12/30 42/81+4/90 42/81+20/30 42/81+28/30