Add 21/70 and 81/8
1st number: 21/70, 2nd number: 10 1/8
21/70 + 81/8 is 417/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 8 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
21/70 = 21 × 4/70 × 4 = 84/280 - Likewise, for the 2nd fraction, since 8 × 35 = 280,
81/8 = 81 × 35/8 × 35 = 2835/280 - Add the two like fractions:
84/280 + 2835/280 = 84 + 2835/280 = 2919/280 - 2919/280 simplified gives 417/40
- So, 21/70 + 81/8 = 417/40
In mixed form: 1017/40
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