Add 20/84 and 90/30
1st number: 20/84, 2nd number: 3 0/30
20/84 + 90/30 is 68/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
20/84 = 20 × 5/84 × 5 = 100/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
90/30 = 90 × 14/30 × 14 = 1260/420 - Add the two like fractions:
100/420 + 1260/420 = 100 + 1260/420 = 1360/420 - 1360/420 simplified gives 68/21
- So, 20/84 + 90/30 = 68/21
In mixed form: 35/21
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