Add 21/4 and 9/70
1st number: 5 1/4, 2nd number: 9/70
21/4 + 9/70 is 753/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
21/4 = 21 × 35/4 × 35 = 735/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
9/70 = 9 × 2/70 × 2 = 18/140 - Add the two like fractions:
735/140 + 18/140 = 735 + 18/140 = 753/140 - So, 21/4 + 9/70 = 753/140
In mixed form: 553/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+9/70 21/4+18/70 21/8+9/70 63/4+9/70 21/4+27/70 21/12+9/70 21/4+45/70 21/20+9/70 21/4+63/70 21/28+9/70