Add 21/8 and 63/70
1st number: 2 5/8, 2nd number: 63/70
21/8 + 63/70 is 141/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 8 × 35 = 280,
21/8 = 21 × 35/8 × 35 = 735/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
63/70 = 63 × 4/70 × 4 = 252/280 - Add the two like fractions:
735/280 + 252/280 = 735 + 252/280 = 987/280 - 987/280 simplified gives 141/40
- So, 21/8 + 63/70 = 141/40
In mixed form: 321/40
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