Add 40/42 and 63/45
1st number: 40/42, 2nd number: 1 18/45
40/42 + 63/45 is 247/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 42 × 15 = 630,
40/42 = 40 × 15/42 × 15 = 600/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
63/45 = 63 × 14/45 × 14 = 882/630 - Add the two like fractions:
600/630 + 882/630 = 600 + 882/630 = 1482/630 - 1482/630 simplified gives 247/105
- So, 40/42 + 63/45 = 247/105
In mixed form: 237/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/42+63/45 40/84+63/45 40/42+63/90