Add 21/15 and 75/21
1st number: 1 6/15, 2nd number: 3 12/21
21/15 + 75/21 is 174/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
21/15 = 21 × 7/15 × 7 = 147/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
75/21 = 75 × 5/21 × 5 = 375/105 - Add the two like fractions:
147/105 + 375/105 = 147 + 375/105 = 522/105 - 522/105 simplified gives 174/35
- So, 21/15 + 75/21 = 174/35
In mixed form: 434/35
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