Add 9/40 and 7/42
9/40 + 7/42 is 47/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 42 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 40 × 21 = 840,
9/40 = 9 × 21/40 × 21 = 189/840 - Likewise, for the 2nd fraction, since 42 × 20 = 840,
7/42 = 7 × 20/42 × 20 = 140/840 - Add the two like fractions:
189/840 + 140/840 = 189 + 140/840 = 329/840 - 329/840 simplified gives 47/120
- So, 9/40 + 7/42 = 47/120
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