Add 54/6 and 21/40, Solve 9 0/6 + 21/40 as a fraction

Add 54/6 and 21/40

1^st number: 9 0/6, 2^nd number: 21/40

54/6 + 21/40 is 381/40.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120

Next, find the equivalent fraction of both fractional numbers with denominator 120
For the 1st fraction, since 6 × 20 = 120,
54/6 = 54 × 20/6 × 20 = 1080/120
Likewise, for the 2nd fraction, since 40 × 3 = 120,
21/40 = 21 × 3/40 × 3 = 63/120
Add the two like fractions:
1080/120 + 63/120 = 1080 + 63/120 = 1143/120
1143/120 simplified gives 381/40
So, 54/6 + 21/40 = 381/40
In mixed form: 921/40

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