Add 75/45 and 21/63
1st number: 1 30/45, 2nd number: 21/63
75/45 + 21/63 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
75/45 = 75 × 7/45 × 7 = 525/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
21/63 = 21 × 5/63 × 5 = 105/315 - Add the two like fractions:
525/315 + 105/315 = 525 + 105/315 = 630/315 - 630/315 simplified gives 2/1
- So, 75/45 + 21/63 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/45+42/63 75/90+21/63