Add 72/16 and 21/90
1st number: 4 8/16, 2nd number: 21/90
72/16 + 21/90 is 71/15.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 16 and 90 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 16 × 45 = 720,
72/16 = 72 × 45/16 × 45 = 3240/720 - Likewise, for the 2nd fraction, since 90 × 8 = 720,
21/90 = 21 × 8/90 × 8 = 168/720 - Add the two like fractions:
3240/720 + 168/720 = 3240 + 168/720 = 3408/720 - 3408/720 simplified gives 71/15
- So, 72/16 + 21/90 = 71/15
In mixed form: 411/15
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