Add 30/40 and 20/63
30/40 + 20/63 is 269/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 40 × 63 = 2520,
30/40 = 30 × 63/40 × 63 = 1890/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
20/63 = 20 × 40/63 × 40 = 800/2520 - Add the two like fractions:
1890/2520 + 800/2520 = 1890 + 800/2520 = 2690/2520 - 2690/2520 simplified gives 269/252
- So, 30/40 + 20/63 = 269/252
In mixed form: 117/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/40+20/63 30/40+40/63 30/80+20/63 90/40+20/63 30/40+60/63