Add 30/16 and 21/40
1st number: 1 14/16, 2nd number: 21/40
30/16 + 21/40 is 12/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 40 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
30/16 = 30 × 5/16 × 5 = 150/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
21/40 = 21 × 2/40 × 2 = 42/80 - Add the two like fractions:
150/80 + 42/80 = 150 + 42/80 = 192/80 - 192/80 simplified gives 12/5
- So, 30/16 + 21/40 = 12/5
In mixed form: 22/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/16+21/40 30/16+42/40 30/32+21/40 30/16+21/80 90/16+21/40 30/16+63/40 30/48+21/40 30/80+21/40