Add 7/90 and 49/42
1st number: 7/90, 2nd number: 1 7/42
7/90 + 49/42 is 56/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
7/90 = 7 × 7/90 × 7 = 49/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
49/42 = 49 × 15/42 × 15 = 735/630 - Add the two like fractions:
49/630 + 735/630 = 49 + 735/630 = 784/630 - 784/630 simplified gives 56/45
- So, 7/90 + 49/42 = 56/45
In mixed form: 111/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90+49/42 7/90+98/42 7/90+49/84 21/90+49/42 35/90+49/42 49/90+49/42