Add 21/25 and 72/70
1st number: 21/25, 2nd number: 1 2/70
21/25 + 72/70 is 327/175.
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,
21/25 = 21 × 14/25 × 14 = 294/350 - Likewise, for the 2nd fraction, since 70 × 5 = 350,
72/70 = 72 × 5/70 × 5 = 360/350 - Add the two like fractions:
294/350 + 360/350 = 294 + 360/350 = 654/350 - 654/350 simplified gives 327/175
- So, 21/25 + 72/70 = 327/175
In mixed form: 1152/175
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+72/70 21/50+72/70 63/25+72/70 21/75+72/70