Add 7/40 and 21/30
7/40 + 21/30 is 7/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 40 × 3 = 120,
7/40 = 7 × 3/40 × 3 = 21/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
21/30 = 21 × 4/30 × 4 = 84/120 - Add the two like fractions:
21/120 + 84/120 = 21 + 84/120 = 105/120 - 105/120 simplified gives 7/8
- So, 7/40 + 21/30 = 7/8
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