Add 75/20 and 9/21
1st number: 3 15/20, 2nd number: 9/21
75/20 + 9/21 is 117/28.
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,
9/21 = 9 × 20/21 × 20 = 180/420 - Add the two like fractions:
1575/420 + 180/420 = 1575 + 180/420 = 1755/420 - 1755/420 simplified gives 117/28
- So, 75/20 + 9/21 = 117/28
In mixed form: 45/28
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