Add 7/45 and 81/40
1st number: 7/45, 2nd number: 2 1/40
7/45 + 81/40 is 157/72.
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,
7/45 = 7 × 8/45 × 8 = 56/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
81/40 = 81 × 9/40 × 9 = 729/360 - Add the two like fractions:
56/360 + 729/360 = 56 + 729/360 = 785/360 - 785/360 simplified gives 157/72
- So, 7/45 + 81/40 = 157/72
In mixed form: 213/72
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45+81/40 7/90+81/40 7/45+81/80 21/45+81/40 35/45+81/40 49/45+81/40