Add 84/14 and 90/20
1st number: 6 0/14, 2nd number: 4 10/20
84/14 + 90/20 is 21/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 14 × 10 = 140,
84/14 = 84 × 10/14 × 10 = 840/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
90/20 = 90 × 7/20 × 7 = 630/140 - Add the two like fractions:
840/140 + 630/140 = 840 + 630/140 = 1470/140 - 1470/140 simplified gives 21/2
- So, 84/14 + 90/20 = 21/2
In mixed form: 101/2
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