Add 21/15 and 54/8
1st number: 1 6/15, 2nd number: 6 6/8
21/15 + 54/8 is 163/20.
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,
21/15 = 21 × 8/15 × 8 = 168/120 - Likewise, for the 2nd fraction, since 8 × 15 = 120,
54/8 = 54 × 15/8 × 15 = 810/120 - Add the two like fractions:
168/120 + 810/120 = 168 + 810/120 = 978/120 - 978/120 simplified gives 163/20
- So, 21/15 + 54/8 = 163/20
In mixed form: 83/20
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