Add 24/21 and 90/18
1st number: 1 3/21, 2nd number: 5 0/18
24/21 + 90/18 is 43/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 18 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 21 × 6 = 126,
24/21 = 24 × 6/21 × 6 = 144/126 - Likewise, for the 2nd fraction, since 18 × 7 = 126,
90/18 = 90 × 7/18 × 7 = 630/126 - Add the two like fractions:
144/126 + 630/126 = 144 + 630/126 = 774/126 - 774/126 simplified gives 43/7
- So, 24/21 + 90/18 = 43/7
In mixed form: 61/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21+90/18 24/42+90/18 24/21+90/36 72/21+90/18 24/63+90/18 24/21+90/54