Add 42/48 and 21/63
42/48 + 21/63 is 29/24.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 48 and 63 is 1008
Next, find the equivalent fraction of both fractional numbers with denominator 1008 - For the 1st fraction, since 48 × 21 = 1008,
42/48 = 42 × 21/48 × 21 = 882/1008 - Likewise, for the 2nd fraction, since 63 × 16 = 1008,
21/63 = 21 × 16/63 × 16 = 336/1008 - Add the two like fractions:
882/1008 + 336/1008 = 882 + 336/1008 = 1218/1008 - 1218/1008 simplified gives 29/24
- So, 42/48 + 21/63 = 29/24
In mixed form: 15/24
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/48+21/63 42/48+42/63 42/96+21/63