Add 8/45 and 42/70
8/45 + 42/70 is 7/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
8/45 = 8 × 14/45 × 14 = 112/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Add the two like fractions:
112/630 + 378/630 = 112 + 378/630 = 490/630 - 490/630 simplified gives 7/9
- So, 8/45 + 42/70 = 7/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/45+42/70 8/45+84/70 8/90+42/70 24/45+42/70 40/45+42/70 56/45+42/70