Add 7/90 and 81/56
1st number: 7/90, 2nd number: 1 25/56
7/90 + 81/56 is 3841/2520.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
7/90 = 7 × 28/90 × 28 = 196/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
81/56 = 81 × 45/56 × 45 = 3645/2520 - Add the two like fractions:
196/2520 + 3645/2520 = 196 + 3645/2520 = 3841/2520 - So, 7/90 + 81/56 = 3841/2520
In mixed form: 11321/2520
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90+81/56 21/90+81/56 35/90+81/56 49/90+81/56