Add 21/8 and 84/30
1st number: 2 5/8, 2nd number: 2 24/30
21/8 + 84/30 is 217/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
21/8 = 21 × 15/8 × 15 = 315/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
84/30 = 84 × 4/30 × 4 = 336/120 - Add the two like fractions:
315/120 + 336/120 = 315 + 336/120 = 651/120 - 651/120 simplified gives 217/40
- So, 21/8 + 84/30 = 217/40
In mixed form: 517/40
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