Add 54/42 and 60/45
1st number: 1 12/42, 2nd number: 1 15/45
54/42 + 60/45 is 55/21.
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,
60/45 = 60 × 14/45 × 14 = 840/630 - Add the two like fractions:
810/630 + 840/630 = 810 + 840/630 = 1650/630 - 1650/630 simplified gives 55/21
- So, 54/42 + 60/45 = 55/21
In mixed form: 213/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+60/45 54/42+60/90