Add 40/42 and 3/40
40/42 + 3/40 is 863/840.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
40/42 = 40 × 20/42 × 20 = 800/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
3/40 = 3 × 21/40 × 21 = 63/840 - Add the two like fractions:
800/840 + 63/840 = 800 + 63/840 = 863/840 - So, 40/42 + 3/40 = 863/840
In mixed form: 123/840
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