Add 72/15 and 90/8
1st number: 4 12/15, 2nd number: 11 2/8
72/15 + 90/8 is 321/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 8 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 15 × 8 = 120,
72/15 = 72 × 8/15 × 8 = 576/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
90/8 = 90 × 15/8 × 15 = 1350/120 - Add the two like fractions:
576/120 + 1350/120 = 576 + 1350/120 = 1926/120 - 1926/120 simplified gives 321/20
- So, 72/15 + 90/8 = 321/20
In mixed form: 161/20
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