Add 21/20 and 60/63
1st number: 1 1/20, 2nd number: 60/63
21/20 + 60/63 is 841/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
21/20 = 21 × 63/20 × 63 = 1323/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
60/63 = 60 × 20/63 × 20 = 1200/1260 - Add the two like fractions:
1323/1260 + 1200/1260 = 1323 + 1200/1260 = 2523/1260 - 2523/1260 simplified gives 841/420
- So, 21/20 + 60/63 = 841/420
In mixed form: 21/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+60/63 21/40+60/63 63/20+60/63 21/60+60/63