Add 21/56 and 36/90
21/56 + 36/90 is 31/40.
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,
21/56 = 21 × 45/56 × 45 = 945/2520 - Likewise, for the 2nd fraction, since 90 × 28 = 2520,
36/90 = 36 × 28/90 × 28 = 1008/2520 - Add the two like fractions:
945/2520 + 1008/2520 = 945 + 1008/2520 = 1953/2520 - 1953/2520 simplified gives 31/40
- So, 21/56 + 36/90 = 31/40
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