Add 24/21 and 90/15
1st number: 1 3/21, 2nd number: 6 0/15
24/21 + 90/15 is 50/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
24/21 = 24 × 5/21 × 5 = 120/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
90/15 = 90 × 7/15 × 7 = 630/105 - Add the two like fractions:
120/105 + 630/105 = 120 + 630/105 = 750/105 - 750/105 simplified gives 50/7
- So, 24/21 + 90/15 = 50/7
In mixed form: 71/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21+90/15 24/42+90/15 24/21+90/30 72/21+90/15 24/63+90/15 24/21+90/45 24/21+90/75