Add 15/84 and 4/40
15/84 + 4/40 is 39/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
15/84 = 15 × 10/84 × 10 = 150/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
4/40 = 4 × 21/40 × 21 = 84/840 - Add the two like fractions:
150/840 + 84/840 = 150 + 84/840 = 234/840 - 234/840 simplified gives 39/140
- So, 15/84 + 4/40 = 39/140
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