Add 2/40 and 81/21
1st number: 2/40, 2nd number: 3 18/21
2/40 + 81/21 is 547/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 21 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
2/40 = 2 × 21/40 × 21 = 42/840 - Likewise, for the 2nd fraction, since 21 × 40 = 840,
81/21 = 81 × 40/21 × 40 = 3240/840 - Add the two like fractions:
42/840 + 3240/840 = 42 + 3240/840 = 3282/840 - 3282/840 simplified gives 547/140
- So, 2/40 + 81/21 = 547/140
In mixed form: 3127/140
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