Add 21/15 and 63/72
1st number: 1 6/15, 2nd number: 63/72
21/15 + 63/72 is 91/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 15 × 24 = 360,
21/15 = 21 × 24/15 × 24 = 504/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
63/72 = 63 × 5/72 × 5 = 315/360 - Add the two like fractions:
504/360 + 315/360 = 504 + 315/360 = 819/360 - 819/360 simplified gives 91/40
- So, 21/15 + 63/72 = 91/40
In mixed form: 211/40
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