Add 42/20 and 20/84
1st number: 2 2/20, 2nd number: 20/84
42/20 + 20/84 is 491/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
42/20 = 42 × 21/20 × 21 = 882/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Add the two like fractions:
882/420 + 100/420 = 882 + 100/420 = 982/420 - 982/420 simplified gives 491/210
- So, 42/20 + 20/84 = 491/210
In mixed form: 271/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+20/84 42/20+40/84 42/40+20/84 42/20+60/84 42/60+20/84