Add 45/63 and 70/12
1st number: 45/63, 2nd number: 5 10/12
45/63 + 70/12 is 275/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 12 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
45/63 = 45 × 4/63 × 4 = 180/252 - Likewise, for the 2nd fraction, since 12 × 21 = 252,
70/12 = 70 × 21/12 × 21 = 1470/252 - Add the two like fractions:
180/252 + 1470/252 = 180 + 1470/252 = 1650/252 - 1650/252 simplified gives 275/42
- So, 45/63 + 70/12 = 275/42
In mixed form: 623/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/63+70/12 45/63+70/24 45/63+70/36 45/63+70/60 45/63+70/84