Add 36/30 and 18/21
1st number: 1 6/30, 2nd number: 18/21
36/30 + 18/21 is 72/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
36/30 = 36 × 7/30 × 7 = 252/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
18/21 = 18 × 10/21 × 10 = 180/210 - Add the two like fractions:
252/210 + 180/210 = 252 + 180/210 = 432/210 - 432/210 simplified gives 72/35
- So, 36/30 + 18/21 = 72/35
In mixed form: 22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+18/21 36/30+36/21 36/60+18/21 36/30+18/42 36/30+54/21 36/90+18/21 36/30+18/63 36/30+90/21