Add 3/10 and 12/84
3/10 + 12/84 is 31/70.
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,
3/10 = 3 × 42/10 × 42 = 126/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
12/84 = 12 × 5/84 × 5 = 60/420 - Add the two like fractions:
126/420 + 60/420 = 126 + 60/420 = 186/420 - 186/420 simplified gives 31/70
- So, 3/10 + 12/84 = 31/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/10+12/84 3/10+24/84 3/20+12/84 9/10+12/84 3/10+36/84 3/30+12/84 15/10+12/84 3/10+60/84 3/50+12/84 21/10+12/84 3/70+12/84