Add 7/45 and 21/35
7/45 + 21/35 is 34/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 35 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
7/45 = 7 × 7/45 × 7 = 49/315 - Likewise, for the 2nd fraction, since 35 × 9 = 315,
21/35 = 21 × 9/35 × 9 = 189/315 - Add the two like fractions:
49/315 + 189/315 = 49 + 189/315 = 238/315 - 238/315 simplified gives 34/45
- So, 7/45 + 21/35 = 34/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45+21/35 7/45+42/35 7/90+21/35 7/45+21/70 21/45+21/35 7/45+63/35 35/45+21/35 49/45+21/35