Add 81/20 and 30/56
1st number: 4 1/20, 2nd number: 30/56
81/20 + 30/56 is 321/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 20 × 14 = 280,
81/20 = 81 × 14/20 × 14 = 1134/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
30/56 = 30 × 5/56 × 5 = 150/280 - Add the two like fractions:
1134/280 + 150/280 = 1134 + 150/280 = 1284/280 - 1284/280 simplified gives 321/70
- So, 81/20 + 30/56 = 321/70
In mixed form: 441/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20+60/56 81/40+30/56 81/20+90/56 81/60+30/56