Add 27/30 and 3/40
27/30 + 3/40 is 39/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
27/30 = 27 × 4/30 × 4 = 108/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
3/40 = 3 × 3/40 × 3 = 9/120 - Add the two like fractions:
108/120 + 9/120 = 108 + 9/120 = 117/120 - 117/120 simplified gives 39/40
- So, 27/30 + 3/40 = 39/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30+3/40 27/30+6/40 27/60+3/40 27/30+3/80 81/30+3/40 27/30+9/40 27/90+3/40 27/30+15/40 27/30+21/40