Add 20/42 and 48/45
1st number: 20/42, 2nd number: 1 3/45
20/42 + 48/45 is 54/35.
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,
20/42 = 20 × 15/42 × 15 = 300/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
48/45 = 48 × 14/45 × 14 = 672/630 - Add the two like fractions:
300/630 + 672/630 = 300 + 672/630 = 972/630 - 972/630 simplified gives 54/35
- So, 20/42 + 48/45 = 54/35
In mixed form: 119/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+48/45 20/42+96/45 20/84+48/45 20/42+48/90 60/42+48/45