Add 21/3 and 42/40
1st number: 7 0/3, 2nd number: 1 2/40
21/3 + 42/40 is 161/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 3 × 40 = 120,
21/3 = 21 × 40/3 × 40 = 840/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
42/40 = 42 × 3/40 × 3 = 126/120 - Add the two like fractions:
840/120 + 126/120 = 840 + 126/120 = 966/120 - 966/120 simplified gives 161/20
- So, 21/3 + 42/40 = 161/20
In mixed form: 81/20
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