Add 63/45 and 15/42
1st number: 1 18/45, 2nd number: 15/42
63/45 + 15/42 is 123/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
63/45 = 63 × 14/45 × 14 = 882/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
15/42 = 15 × 15/42 × 15 = 225/630 - Add the two like fractions:
882/630 + 225/630 = 882 + 225/630 = 1107/630 - 1107/630 simplified gives 123/70
- So, 63/45 + 15/42 = 123/70
In mixed form: 153/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/45+30/42 63/90+15/42 63/45+15/84 63/45+45/42 63/45+75/42