Add 21/56 and 4/90
21/56 + 4/90 is 151/360.
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,
4/90 = 4 × 28/90 × 28 = 112/2520 - Add the two like fractions:
945/2520 + 112/2520 = 945 + 112/2520 = 1057/2520 - 1057/2520 simplified gives 151/360
- So, 21/56 + 4/90 = 151/360
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