Add 20/2 and 36/21
1st number: 10 0/2, 2nd number: 1 15/21
20/2 + 36/21 is 82/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
20/2 = 20 × 21/2 × 21 = 420/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
36/21 = 36 × 2/21 × 2 = 72/42 - Add the two like fractions:
420/42 + 72/42 = 420 + 72/42 = 492/42 - 492/42 simplified gives 82/7
- So, 20/2 + 36/21 = 82/7
In mixed form: 115/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/2+36/21 20/2+72/21 20/4+36/21 20/2+36/42 60/2+36/21 20/6+36/21 20/2+36/63 20/10+36/21 20/14+36/21