Add 3/30 and 75/21
1st number: 3/30, 2nd number: 3 12/21
3/30 + 75/21 is 257/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
3/30 = 3 × 7/30 × 7 = 21/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
75/21 = 75 × 10/21 × 10 = 750/210 - Add the two like fractions:
21/210 + 750/210 = 21 + 750/210 = 771/210 - 771/210 simplified gives 257/70
- So, 3/30 + 75/21 = 257/70
In mixed form: 347/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/30+75/21 3/60+75/21 3/30+75/42 9/30+75/21 3/90+75/21 3/30+75/63 15/30+75/21 21/30+75/21