Add 42/20 and 12/84
1st number: 2 2/20, 2nd number: 12/84
42/20 + 12/84 is 157/70.
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,
12/84 = 12 × 5/84 × 5 = 60/420 - Add the two like fractions:
882/420 + 60/420 = 882 + 60/420 = 942/420 - 942/420 simplified gives 157/70
- So, 42/20 + 12/84 = 157/70
In mixed form: 217/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+12/84 42/20+24/84 42/40+12/84 42/20+36/84 42/60+12/84 42/20+60/84