Add 72/45 and 2/21
1st number: 1 27/45, 2nd number: 2/21
72/45 + 2/21 is 178/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 21 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 45 × 7 = 315,
72/45 = 72 × 7/45 × 7 = 504/315 - Likewise, for the 2nd fraction, since 21 × 15 = 315,
2/21 = 2 × 15/21 × 15 = 30/315 - Add the two like fractions:
504/315 + 30/315 = 504 + 30/315 = 534/315 - 534/315 simplified gives 178/105
- So, 72/45 + 2/21 = 178/105
In mixed form: 173/105
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