Add 84/15 and 90/56
1st number: 5 9/15, 2nd number: 1 34/56
84/15 + 90/56 is 1009/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 56 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 15 × 56 = 840,
84/15 = 84 × 56/15 × 56 = 4704/840 - Likewise, for the 2nd fraction, since 56 × 15 = 840,
90/56 = 90 × 15/56 × 15 = 1350/840 - Add the two like fractions:
4704/840 + 1350/840 = 4704 + 1350/840 = 6054/840 - 6054/840 simplified gives 1009/140
- So, 84/15 + 90/56 = 1009/140
In mixed form: 729/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+90/56 84/45+90/56 84/75+90/56