Add 15/42 and 21/36
15/42 + 21/36 is 79/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 42 × 6 = 252,
15/42 = 15 × 6/42 × 6 = 90/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
21/36 = 21 × 7/36 × 7 = 147/252 - Add the two like fractions:
90/252 + 147/252 = 90 + 147/252 = 237/252 - 237/252 simplified gives 79/84
- So, 15/42 + 21/36 = 79/84
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