Add 7/90 and 21/35
7/90 + 21/35 is 61/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 35 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 35 × 18 = 630,
21/35 = 21 × 18/35 × 18 = 378/630 - Add the two like fractions:
49/630 + 378/630 = 49 + 378/630 = 427/630 - 427/630 simplified gives 61/90
- So, 7/90 + 21/35 = 61/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/90+21/35 7/90+42/35 7/90+21/70 21/90+21/35 7/90+63/35 35/90+21/35 49/90+21/35