Add 54/42 and 40/45
1st number: 1 12/42, 2nd number: 40/45
54/42 + 40/45 is 137/63.
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,
54/42 = 54 × 15/42 × 15 = 810/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
40/45 = 40 × 14/45 × 14 = 560/630 - Add the two like fractions:
810/630 + 560/630 = 810 + 560/630 = 1370/630 - 1370/630 simplified gives 137/63
- So, 54/42 + 40/45 = 137/63
In mixed form: 211/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/42+80/45 54/84+40/45 54/42+40/90