Add 21/10 and 4/84
1st number: 2 1/10, 2nd number: 4/84
21/10 + 4/84 is 451/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 10 × 42 = 420,
21/10 = 21 × 42/10 × 42 = 882/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
4/84 = 4 × 5/84 × 5 = 20/420 - Add the two like fractions:
882/420 + 20/420 = 882 + 20/420 = 902/420 - 902/420 simplified gives 451/210
- So, 21/10 + 4/84 = 451/210
In mixed form: 231/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10+4/84 21/10+8/84 21/20+4/84 63/10+4/84 21/10+12/84 21/30+4/84 21/10+20/84 21/50+4/84 21/10+28/84 21/70+4/84