Add 18/45 and 63/56
1st number: 18/45, 2nd number: 1 7/56
18/45 + 63/56 is 61/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 45 × 56 = 2520,
18/45 = 18 × 56/45 × 56 = 1008/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
63/56 = 63 × 45/56 × 45 = 2835/2520 - Add the two like fractions:
1008/2520 + 2835/2520 = 1008 + 2835/2520 = 3843/2520 - 3843/2520 simplified gives 61/40
- So, 18/45 + 63/56 = 61/40
In mixed form: 121/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/45+63/56 18/90+63/56 54/45+63/56 90/45+63/56