Add 21/98 and 90/70
1st number: 21/98, 2nd number: 1 20/70
21/98 + 90/70 is 3/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 70 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 98 × 5 = 490,
21/98 = 21 × 5/98 × 5 = 105/490 - Likewise, for the 2nd fraction, since 70 × 7 = 490,
90/70 = 90 × 7/70 × 7 = 630/490 - Add the two like fractions:
105/490 + 630/490 = 105 + 630/490 = 735/490 - 735/490 simplified gives 3/2
- So, 21/98 + 90/70 = 3/2
In mixed form: 11/2
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