Add 12/25 and 21/70
12/25 + 21/70 is 39/50.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 70 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 25 × 14 = 350,
12/25 = 12 × 14/25 × 14 = 168/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
21/70 = 21 × 5/70 × 5 = 105/350 - Add the two like fractions:
168/350 + 105/350 = 168 + 105/350 = 273/350 - 273/350 simplified gives 39/50
- So, 12/25 + 21/70 = 39/50
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/25+21/70 12/25+42/70 12/50+21/70 36/25+21/70 12/25+63/70 12/75+21/70 60/25+21/70 84/25+21/70