Add 81/5 and 20/56
1st number: 16 1/5, 2nd number: 20/56
81/5 + 20/56 is 1159/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 5 × 56 = 280,
81/5 = 81 × 56/5 × 56 = 4536/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
20/56 = 20 × 5/56 × 5 = 100/280 - Add the two like fractions:
4536/280 + 100/280 = 4536 + 100/280 = 4636/280 - 4636/280 simplified gives 1159/70
- So, 81/5 + 20/56 = 1159/70
In mixed form: 1639/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5+40/56 81/10+20/56 81/5+60/56 81/15+20/56 81/25+20/56 81/35+20/56