Add 63/21 and 45/35
1st number: 3 0/21, 2nd number: 1 10/35
63/21 + 45/35 is 30/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
63/21 = 63 × 5/21 × 5 = 315/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
45/35 = 45 × 3/35 × 3 = 135/105 - Add the two like fractions:
315/105 + 135/105 = 315 + 135/105 = 450/105 - 450/105 simplified gives 30/7
- So, 63/21 + 45/35 = 30/7
In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/21+90/35 63/42+45/35 63/21+45/70