Add 21/5 and 90/84
1st number: 4 1/5, 2nd number: 1 6/84
21/5 + 90/84 is 369/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 5 × 84 = 420,
21/5 = 21 × 84/5 × 84 = 1764/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Add the two like fractions:
1764/420 + 450/420 = 1764 + 450/420 = 2214/420 - 2214/420 simplified gives 369/70
- So, 21/5 + 90/84 = 369/70
In mixed form: 519/70
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