Add 42/21 and 1/35
1st number: 2 0/21, 2nd number: 1/35
42/21 + 1/35 is 71/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
42/21 = 42 × 5/21 × 5 = 210/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
1/35 = 1 × 3/35 × 3 = 3/105 - Add the two like fractions:
210/105 + 3/105 = 210 + 3/105 = 213/105 - 213/105 simplified gives 71/35
- So, 42/21 + 1/35 = 71/35
In mixed form: 21/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+1/35 42/21+2/35 42/21+1/70 42/21+3/35 42/63+1/35 42/21+5/35 42/21+7/35