Add 21/72 and 9/5
1st number: 21/72, 2nd number: 1 4/5
21/72 + 9/5 is 251/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 5 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Likewise, for the 2nd fraction, since 5 × 72 = 360,
9/5 = 9 × 72/5 × 72 = 648/360 - Add the two like fractions:
105/360 + 648/360 = 105 + 648/360 = 753/360 - 753/360 simplified gives 251/120
- So, 21/72 + 9/5 = 251/120
In mixed form: 211/120
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