Add 21/30 and 54/40
1st number: 21/30, 2nd number: 1 14/40
21/30 + 54/40 is 41/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 30 × 4 = 120,
21/30 = 21 × 4/30 × 4 = 84/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
54/40 = 54 × 3/40 × 3 = 162/120 - Add the two like fractions:
84/120 + 162/120 = 84 + 162/120 = 246/120 - 246/120 simplified gives 41/20
- So, 21/30 + 54/40 = 41/20
In mixed form: 21/20
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