Add 40/80 and 15/63
40/80 + 15/63 is 31/42.
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,
40/80 = 40 × 63/80 × 63 = 2520/5040 - Likewise, for the 2nd fraction, since 63 × 80 = 5040,
15/63 = 15 × 80/63 × 80 = 1200/5040 - Add the two like fractions:
2520/5040 + 1200/5040 = 2520 + 1200/5040 = 3720/5040 - 3720/5040 simplified gives 31/42
- So, 40/80 + 15/63 = 31/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/80+30/63 40/80+45/63 40/80+75/63