Add 25/70 and 40/21
1st number: 25/70, 2nd number: 1 19/21
25/70 + 40/21 is 95/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
25/70 = 25 × 3/70 × 3 = 75/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
40/21 = 40 × 10/21 × 10 = 400/210 - Add the two like fractions:
75/210 + 400/210 = 75 + 400/210 = 475/210 - 475/210 simplified gives 95/42
- So, 25/70 + 40/21 = 95/42
In mixed form: 211/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/70+40/21 25/70+80/21 25/70+40/42 75/70+40/21 25/70+40/63