Add 81/4 and 70/9
1st number: 20 1/4, 2nd number: 7 7/9
81/4 + 70/9 is 1009/36.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 9 is 36
Next, find the equivalent fraction of both fractional numbers with denominator 36 - For the 1st fraction, since 4 × 9 = 36,
81/4 = 81 × 9/4 × 9 = 729/36 - Likewise, for the 2nd fraction, since 9 × 4 = 36,
70/9 = 70 × 4/9 × 4 = 280/36 - Add the two like fractions:
729/36 + 280/36 = 729 + 280/36 = 1009/36 - So, 81/4 + 70/9 = 1009/36
In mixed form: 281/36
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/8+70/9 81/4+70/18 81/12+70/9 81/4+70/27 81/20+70/9 81/4+70/45 81/28+70/9 81/4+70/63