Add 42/21 and 10/5
1st number: 2 0/21, 2nd number: 2 0/5
42/21 + 10/5 is 4/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 5 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 5 × 21 = 105,
10/5 = 10 × 21/5 × 21 = 210/105 - Add the two like fractions:
210/105 + 210/105 = 210 + 210/105 = 420/105 - 420/105 simplified gives 4/1
- So, 42/21 + 10/5 = 4/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+10/5 42/21+20/5 42/21+30/5 42/63+10/5 42/21+10/15 42/21+50/5 42/21+10/25 42/21+70/5 42/21+10/35