Add 75/70 and 21/40
1st number: 1 5/70, 2nd number: 21/40
75/70 + 21/40 is 447/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
75/70 = 75 × 4/70 × 4 = 300/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
21/40 = 21 × 7/40 × 7 = 147/280 - Add the two like fractions:
300/280 + 147/280 = 300 + 147/280 = 447/280 - So, 75/70 + 21/40 = 447/280
In mixed form: 1167/280
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