Add 15/56 and 42/90
15/56 + 42/90 is 617/840.
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,
15/56 = 15 × 45/56 × 45 = 675/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
42/90 = 42 × 28/90 × 28 = 1176/2520 - Add the two like fractions:
675/2520 + 1176/2520 = 675 + 1176/2520 = 1851/2520 - 1851/2520 simplified gives 617/840
- So, 15/56 + 42/90 = 617/840
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