Add 90/42 and 72/45
1st number: 2 6/42, 2nd number: 1 27/45
90/42 + 72/45 is 131/35.
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,
90/42 = 90 × 15/42 × 15 = 1350/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
72/45 = 72 × 14/45 × 14 = 1008/630 - Add the two like fractions:
1350/630 + 1008/630 = 1350 + 1008/630 = 2358/630 - 2358/630 simplified gives 131/35
- So, 90/42 + 72/45 = 131/35
In mixed form: 326/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+72/45 90/42+72/90