Add 75/20 and 12/21
1st number: 3 15/20, 2nd number: 12/21
75/20 + 12/21 is 121/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
75/20 = 75 × 21/20 × 21 = 1575/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
12/21 = 12 × 20/21 × 20 = 240/420 - Add the two like fractions:
1575/420 + 240/420 = 1575 + 240/420 = 1815/420 - 1815/420 simplified gives 121/28
- So, 75/20 + 12/21 = 121/28
In mixed form: 49/28
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