Add 75/45 and 42/70
1st number: 1 30/45, 2nd number: 42/70
75/45 + 42/70 is 34/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
75/45 = 75 × 14/45 × 14 = 1050/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Add the two like fractions:
1050/630 + 378/630 = 1050 + 378/630 = 1428/630 - 1428/630 simplified gives 34/15
- So, 75/45 + 42/70 = 34/15
In mixed form: 24/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/45+84/70 75/90+42/70