Add 21/80 and 70/40
1st number: 21/80, 2nd number: 1 30/40
21/80 + 70/40 is 161/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 40 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Likewise, for the 2nd fraction, since 40 × 2 = 80,
70/40 = 70 × 2/40 × 2 = 140/80 - Add the two like fractions:
21/80 + 140/80 = 21 + 140/80 = 161/80 - So, 21/80 + 70/40 = 161/80
In mixed form: 21/80
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