Add 72/20 and 70/9
1st number: 3 12/20, 2nd number: 7 7/9
72/20 + 70/9 is 512/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 9 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
72/20 = 72 × 9/20 × 9 = 648/180 - Likewise, for the 2nd fraction, since 9 × 20 = 180,
70/9 = 70 × 20/9 × 20 = 1400/180 - Add the two like fractions:
648/180 + 1400/180 = 648 + 1400/180 = 2048/180 - 2048/180 simplified gives 512/45
- So, 72/20 + 70/9 = 512/45
In mixed form: 1117/45
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