Add 42/90 and 18/56
42/90 + 18/56 is 331/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 56 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 90 × 28 = 2520,
42/90 = 42 × 28/90 × 28 = 1176/2520 - Likewise, for the 2nd fraction, since 56 × 45 = 2520,
18/56 = 18 × 45/56 × 45 = 810/2520 - Add the two like fractions:
1176/2520 + 810/2520 = 1176 + 810/2520 = 1986/2520 - 1986/2520 simplified gives 331/420
- So, 42/90 + 18/56 = 331/420
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