Add 90/40 and 21/84
1st number: 2 10/40, 2nd number: 21/84
90/40 + 21/84 is 5/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 84 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
90/40 = 90 × 21/40 × 21 = 1890/840 - Likewise, for the 2nd fraction, since 84 × 10 = 840,
21/84 = 21 × 10/84 × 10 = 210/840 - Add the two like fractions:
1890/840 + 210/840 = 1890 + 210/840 = 2100/840 - 2100/840 simplified gives 5/2
- So, 90/40 + 21/84 = 5/2
In mixed form: 21/2
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