Add 21/70 and 36/28
1st number: 21/70, 2nd number: 1 8/28
21/70 + 36/28 is 111/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
21/70 = 21 × 2/70 × 2 = 42/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
36/28 = 36 × 5/28 × 5 = 180/140 - Add the two like fractions:
42/140 + 180/140 = 42 + 180/140 = 222/140 - 222/140 simplified gives 111/70
- So, 21/70 + 36/28 = 111/70
In mixed form: 141/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+36/28 21/70+72/28 21/70+36/56 63/70+36/28 21/70+36/84