Add 90/18 and 48/40
1st number: 5 0/18, 2nd number: 1 8/40
90/18 + 48/40 is 31/5.
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,
90/18 = 90 × 20/18 × 20 = 1800/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
48/40 = 48 × 9/40 × 9 = 432/360 - Add the two like fractions:
1800/360 + 432/360 = 1800 + 432/360 = 2232/360 - 2232/360 simplified gives 31/5
- So, 90/18 + 48/40 = 31/5
In mixed form: 61/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/18+96/40 90/36+48/40 90/18+48/80 90/54+48/40