Add 63/9 and 42/40
1st number: 7 0/9, 2nd number: 1 2/40
63/9 + 42/40 is 161/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 9 × 40 = 360,
63/9 = 63 × 40/9 × 40 = 2520/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
42/40 = 42 × 9/40 × 9 = 378/360 - Add the two like fractions:
2520/360 + 378/360 = 2520 + 378/360 = 2898/360 - 2898/360 simplified gives 161/20
- So, 63/9 + 42/40 = 161/20
In mixed form: 81/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/9+84/40 63/18+42/40 63/9+42/80 63/27+42/40 63/45+42/40