Add 21/7 and 36/40
1st number: 3 0/7, 2nd number: 36/40
21/7 + 36/40 is 39/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
21/7 = 21 × 40/7 × 40 = 840/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
36/40 = 36 × 7/40 × 7 = 252/280 - Add the two like fractions:
840/280 + 252/280 = 840 + 252/280 = 1092/280 - 1092/280 simplified gives 39/10
- So, 21/7 + 36/40 = 39/10
In mixed form: 39/10
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