Add 75/21 and 72/28
1st number: 3 12/21, 2nd number: 2 16/28
75/21 + 72/28 is 43/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
75/21 = 75 × 4/21 × 4 = 300/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
72/28 = 72 × 3/28 × 3 = 216/84 - Add the two like fractions:
300/84 + 216/84 = 300 + 216/84 = 516/84 - 516/84 simplified gives 43/7
- So, 75/21 + 72/28 = 43/7
In mixed form: 61/7
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