Add 25/42 and 15/40
25/42 + 15/40 is 163/168.
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,
25/42 = 25 × 20/42 × 20 = 500/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
15/40 = 15 × 21/40 × 21 = 315/840 - Add the two like fractions:
500/840 + 315/840 = 500 + 315/840 = 815/840 - 815/840 simplified gives 163/168
- So, 25/42 + 15/40 = 163/168
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