Add 72/30 and 40/42
1st number: 2 12/30, 2nd number: 40/42
72/30 + 40/42 is 352/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
72/30 = 72 × 7/30 × 7 = 504/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
40/42 = 40 × 5/42 × 5 = 200/210 - Add the two like fractions:
504/210 + 200/210 = 504 + 200/210 = 704/210 - 704/210 simplified gives 352/105
- So, 72/30 + 40/42 = 352/105
In mixed form: 337/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/30+80/42 72/60+40/42 72/30+40/84 72/90+40/42