Add 84/60 and 42/63
1st number: 1 24/60, 2nd number: 42/63
84/60 + 42/63 is 31/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 60 × 21 = 1260,
84/60 = 84 × 21/60 × 21 = 1764/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
42/63 = 42 × 20/63 × 20 = 840/1260 - Add the two like fractions:
1764/1260 + 840/1260 = 1764 + 840/1260 = 2604/1260 - 2604/1260 simplified gives 31/15
- So, 84/60 + 42/63 = 31/15
In mixed form: 21/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60+84/63