Add 42/2 and 72/63
1st number: 21 0/2, 2nd number: 1 9/63
42/2 + 72/63 is 155/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 2 × 63 = 126,
42/2 = 42 × 63/2 × 63 = 2646/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
72/63 = 72 × 2/63 × 2 = 144/126 - Add the two like fractions:
2646/126 + 144/126 = 2646 + 144/126 = 2790/126 - 2790/126 simplified gives 155/7
- So, 42/2 + 72/63 = 155/7
In mixed form: 221/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/2+72/63 42/4+72/63 42/6+72/63 42/10+72/63 42/14+72/63