Add 20/80 and 42/63
20/80 + 42/63 is 11/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 63 is 5040
Next, find the equivalent fraction of both fractional numbers with denominator 5040 - For the 1st fraction, since 80 × 63 = 5040,
20/80 = 20 × 63/80 × 63 = 1260/5040 - Likewise, for the 2nd fraction, since 63 × 80 = 5040,
42/63 = 42 × 80/63 × 80 = 3360/5040 - Add the two like fractions:
1260/5040 + 3360/5040 = 1260 + 3360/5040 = 4620/5040 - 4620/5040 simplified gives 11/12
- So, 20/80 + 42/63 = 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/80+42/63 20/80+84/63 60/80+42/63