Add 72/45 and 12/20
1st number: 1 27/45, 2nd number: 12/20
72/45 + 12/20 is 11/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
72/45 = 72 × 4/45 × 4 = 288/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
12/20 = 12 × 9/20 × 9 = 108/180 - Add the two like fractions:
288/180 + 108/180 = 288 + 108/180 = 396/180 - 396/180 simplified gives 11/5
- So, 72/45 + 12/20 = 11/5
In mixed form: 21/5
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