Add 27/30 and 18/42
27/30 + 18/42 is 93/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
27/30 = 27 × 7/30 × 7 = 189/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
18/42 = 18 × 5/42 × 5 = 90/210 - Add the two like fractions:
189/210 + 90/210 = 189 + 90/210 = 279/210 - 279/210 simplified gives 93/70
- So, 27/30 + 18/42 = 93/70
In mixed form: 123/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/30+18/42 27/30+36/42 27/60+18/42 27/30+18/84 81/30+18/42 27/30+54/42 27/90+18/42 27/30+90/42