Add 21/45 and 70/27
1st number: 21/45, 2nd number: 2 16/27
21/45 + 70/27 is 413/135.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 27 is 135
Next, find the equivalent fraction of both fractional numbers with denominator 135 - For the 1st fraction, since 45 × 3 = 135,
21/45 = 21 × 3/45 × 3 = 63/135 - Likewise, for the 2nd fraction, since 27 × 5 = 135,
70/27 = 70 × 5/27 × 5 = 350/135 - Add the two like fractions:
63/135 + 350/135 = 63 + 350/135 = 413/135 - So, 21/45 + 70/27 = 413/135
In mixed form: 38/135
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/45+70/27 21/90+70/27 21/45+70/54 63/45+70/27 21/45+70/81