Add 81/16 and 8/20
1st number: 5 1/16, 2nd number: 8/20
81/16 + 8/20 is 437/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 16 × 5 = 80,
81/16 = 81 × 5/16 × 5 = 405/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
8/20 = 8 × 4/20 × 4 = 32/80 - Add the two like fractions:
405/80 + 32/80 = 405 + 32/80 = 437/80 - So, 81/16 + 8/20 = 437/80
In mixed form: 537/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/16+16/20 81/32+8/20 81/16+8/40 81/16+24/20 81/48+8/20 81/16+8/60 81/16+40/20 81/80+8/20 81/16+56/20