Add 21/4 and 30/16
1st number: 5 1/4, 2nd number: 1 14/16
21/4 + 30/16 is 57/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 16 is 16
Next, find the equivalent fraction of both fractional numbers with denominator 16 - For the 1st fraction, since 4 × 4 = 16,
21/4 = 21 × 4/4 × 4 = 84/16 - Likewise, for the 2nd fraction, since 16 × 1 = 16,
30/16 = 30 × 1/16 × 1 = 30/16 - Add the two like fractions:
84/16 + 30/16 = 84 + 30/16 = 114/16 - 114/16 simplified gives 57/8
- So, 21/4 + 30/16 = 57/8
In mixed form: 71/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/4+30/16 21/4+60/16 21/8+30/16 21/4+30/32 63/4+30/16 21/4+90/16 21/12+30/16 21/4+30/48 21/20+30/16 21/4+30/80 21/28+30/16