Add 42/56 and 15/90
42/56 + 15/90 is 11/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 90 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 56 × 45 = 2520,
42/56 = 42 × 45/56 × 45 = 1890/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
15/90 = 15 × 28/90 × 28 = 420/2520 - Add the two like fractions:
1890/2520 + 420/2520 = 1890 + 420/2520 = 2310/2520 - 2310/2520 simplified gives 11/12
- So, 42/56 + 15/90 = 11/12
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