Add 81/20 and 35/45
1st number: 4 1/20, 2nd number: 35/45
81/20 + 35/45 is 869/180.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 45 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
81/20 = 81 × 9/20 × 9 = 729/180 - Likewise, for the 2nd fraction, since 45 × 4 = 180,
35/45 = 35 × 4/45 × 4 = 140/180 - Add the two like fractions:
729/180 + 140/180 = 729 + 140/180 = 869/180 - So, 81/20 + 35/45 = 869/180
In mixed form: 4149/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/20+70/45 81/40+35/45 81/20+35/90 81/60+35/45