Add 12/63 and 42/70
12/63 + 42/70 is 83/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
12/63 = 12 × 10/63 × 10 = 120/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Add the two like fractions:
120/630 + 378/630 = 120 + 378/630 = 498/630 - 498/630 simplified gives 83/105
- So, 12/63 + 42/70 = 83/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63+42/70 12/63+84/70 36/63+42/70 60/63+42/70 84/63+42/70