Add 81/18 and 48/40
1st number: 4 9/18, 2nd number: 1 8/40
81/18 + 48/40 is 57/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 18 × 20 = 360,
81/18 = 81 × 20/18 × 20 = 1620/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
48/40 = 48 × 9/40 × 9 = 432/360 - Add the two like fractions:
1620/360 + 432/360 = 1620 + 432/360 = 2052/360 - 2052/360 simplified gives 57/10
- So, 81/18 + 48/40 = 57/10
In mixed form: 57/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18+96/40 81/36+48/40 81/18+48/80 81/54+48/40 81/90+48/40