Add 54/16 and 21/40
1st number: 3 6/16, 2nd number: 21/40
54/16 + 21/40 is 39/10.
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,
54/16 = 54 × 5/16 × 5 = 270/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
21/40 = 21 × 2/40 × 2 = 42/80 - Add the two like fractions:
270/80 + 42/80 = 270 + 42/80 = 312/80 - 312/80 simplified gives 39/10
- So, 54/16 + 21/40 = 39/10
In mixed form: 39/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/16+42/40 54/32+21/40 54/16+21/80 54/16+63/40 54/48+21/40 54/80+21/40