Add 15/40 and 45/63
15/40 + 45/63 is 61/56.
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,
15/40 = 15 × 63/40 × 63 = 945/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
45/63 = 45 × 40/63 × 40 = 1800/2520 - Add the two like fractions:
945/2520 + 1800/2520 = 945 + 1800/2520 = 2745/2520 - 2745/2520 simplified gives 61/56
- So, 15/40 + 45/63 = 61/56
In mixed form: 15/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/40+45/63 15/40+90/63 15/80+45/63 45/40+45/63 75/40+45/63