Add 12/45 and 63/7
1st number: 12/45, 2nd number: 9 0/7
12/45 + 63/7 is 139/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 7 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
12/45 = 12 × 7/45 × 7 = 84/315 - Likewise, for the 2nd fraction, since 7 × 45 = 315,
63/7 = 63 × 45/7 × 45 = 2835/315 - Add the two like fractions:
84/315 + 2835/315 = 84 + 2835/315 = 2919/315 - 2919/315 simplified gives 139/15
- So, 12/45 + 63/7 = 139/15
In mixed form: 94/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/45+63/7 12/90+63/7 12/45+63/14 36/45+63/7 12/45+63/21 60/45+63/7 12/45+63/35 84/45+63/7 12/45+63/49