Add 15/63 and 20/45
15/63 + 20/45 is 43/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 63 × 5 = 315,
15/63 = 15 × 5/63 × 5 = 75/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
20/45 = 20 × 7/45 × 7 = 140/315 - Add the two like fractions:
75/315 + 140/315 = 75 + 140/315 = 215/315 - 215/315 simplified gives 43/63
- So, 15/63 + 20/45 = 43/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/63+20/45 15/63+40/45 15/63+20/90 45/63+20/45 15/63+60/45 75/63+20/45