Add 21/70 and 10/25
21/70 + 10/25 is 7/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 25 is 350
Next, find the equivalent fraction of both fractional numbers with denominator 350 - For the 1st fraction, since 70 × 5 = 350,
21/70 = 21 × 5/70 × 5 = 105/350 - Likewise, for the 2nd fraction, since 25 × 14 = 350,
10/25 = 10 × 14/25 × 14 = 140/350 - Add the two like fractions:
105/350 + 140/350 = 105 + 140/350 = 245/350 - 245/350 simplified gives 7/10
- So, 21/70 + 10/25 = 7/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/70+10/25 21/70+20/25 21/70+10/50 63/70+10/25 21/70+30/25 21/70+10/75 21/70+50/25 21/70+70/25