Add 21/72 and 63/20
1st number: 21/72, 2nd number: 3 3/20
21/72 + 63/20 is 413/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 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 20 × 18 = 360,
63/20 = 63 × 18/20 × 18 = 1134/360 - Add the two like fractions:
105/360 + 1134/360 = 105 + 1134/360 = 1239/360 - 1239/360 simplified gives 413/120
- So, 21/72 + 63/20 = 413/120
In mixed form: 353/120
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