Add 12/63 and 42/90
12/63 + 42/90 is 23/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 90 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 90 × 7 = 630,
42/90 = 42 × 7/90 × 7 = 294/630 - Add the two like fractions:
120/630 + 294/630 = 120 + 294/630 = 414/630 - 414/630 simplified gives 23/35
- So, 12/63 + 42/90 = 23/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63+42/90 12/63+84/90 36/63+42/90 60/63+42/90 84/63+42/90