Add 81/18 and 32/40
1st number: 4 9/18, 2nd number: 32/40
81/18 + 32/40 is 53/10.
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,
32/40 = 32 × 9/40 × 9 = 288/360 - Add the two like fractions:
1620/360 + 288/360 = 1620 + 288/360 = 1908/360 - 1908/360 simplified gives 53/10
- So, 81/18 + 32/40 = 53/10
In mixed form: 53/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/18+64/40 81/36+32/40 81/18+32/80 81/18+96/40 81/54+32/40 81/90+32/40