Add 18/72 and 21/16
1st number: 18/72, 2nd number: 1 5/16
18/72 + 21/16 is 25/16.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 16 is 144
Next, find the equivalent fraction of both fractional numbers with denominator 144 - For the 1st fraction, since 72 × 2 = 144,
18/72 = 18 × 2/72 × 2 = 36/144 - Likewise, for the 2nd fraction, since 16 × 9 = 144,
21/16 = 21 × 9/16 × 9 = 189/144 - Add the two like fractions:
36/144 + 189/144 = 36 + 189/144 = 225/144 - 225/144 simplified gives 25/16
- So, 18/72 + 21/16 = 25/16
In mixed form: 19/16
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