Add 84/21 and 90/6
1st number: 4 0/21, 2nd number: 15 0/6
84/21 + 90/6 is 19/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 21 × 2 = 42,
84/21 = 84 × 2/21 × 2 = 168/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
90/6 = 90 × 7/6 × 7 = 630/42 - Add the two like fractions:
168/42 + 630/42 = 168 + 630/42 = 798/42 - 798/42 simplified gives 19/1
- So, 84/21 + 90/6 = 19/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42+90/6 84/21+90/12 84/63+90/6 84/21+90/18 84/21+90/30 84/21+90/42