Add 5/7 and 42/45
5/7 + 42/45 is 173/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 7 × 45 = 315,
5/7 = 5 × 45/7 × 45 = 225/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
42/45 = 42 × 7/45 × 7 = 294/315 - Add the two like fractions:
225/315 + 294/315 = 225 + 294/315 = 519/315 - 519/315 simplified gives 173/105
- So, 5/7 + 42/45 = 173/105
In mixed form: 168/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/7+42/45 5/7+84/45 5/14+42/45 5/7+42/90 15/7+42/45 5/21+42/45 25/7+42/45 5/35+42/45 35/7+42/45 5/49+42/45