Add 8/42 and 90/21
1st number: 8/42, 2nd number: 4 6/21
8/42 + 90/21 is 94/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
8/42 = 8 × 1/42 × 1 = 8/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
90/21 = 90 × 2/21 × 2 = 180/42 - Add the two like fractions:
8/42 + 180/42 = 8 + 180/42 = 188/42 - 188/42 simplified gives 94/21
- So, 8/42 + 90/21 = 94/21
In mixed form: 410/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+90/21 8/84+90/21 8/42+90/42 24/42+90/21 8/42+90/63 40/42+90/21 56/42+90/21