Add 72/20 and 21/36
1st number: 3 12/20, 2nd number: 21/36
72/20 + 21/36 is 251/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 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 36 × 5 = 180,
21/36 = 21 × 5/36 × 5 = 105/180 - Add the two like fractions:
648/180 + 105/180 = 648 + 105/180 = 753/180 - 753/180 simplified gives 251/60
- So, 72/20 + 21/36 = 251/60
In mixed form: 411/60
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