Add 81/45 and 3/40
1st number: 1 36/45, 2nd number: 3/40
81/45 + 3/40 is 15/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
81/45 = 81 × 8/45 × 8 = 648/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
3/40 = 3 × 9/40 × 9 = 27/360 - Add the two like fractions:
648/360 + 27/360 = 648 + 27/360 = 675/360 - 675/360 simplified gives 15/8
- So, 81/45 + 3/40 = 15/8
In mixed form: 17/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/45+6/40 81/90+3/40 81/45+3/80 81/45+9/40 81/45+15/40 81/45+21/40