Add 81/5 and 42/63
1st number: 16 1/5, 2nd number: 42/63
81/5 + 42/63 is 253/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 63 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 5 × 63 = 315,
81/5 = 81 × 63/5 × 63 = 5103/315 - Likewise, for the 2nd fraction, since 63 × 5 = 315,
42/63 = 42 × 5/63 × 5 = 210/315 - Add the two like fractions:
5103/315 + 210/315 = 5103 + 210/315 = 5313/315 - 5313/315 simplified gives 253/15
- So, 81/5 + 42/63 = 253/15
In mixed form: 1613/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5+84/63 81/10+42/63 81/15+42/63 81/25+42/63 81/35+42/63