Add 3/5 and 21/56
3/5 + 21/56 is 39/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 5 × 56 = 280,
3/5 = 3 × 56/5 × 56 = 168/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
21/56 = 21 × 5/56 × 5 = 105/280 - Add the two like fractions:
168/280 + 105/280 = 168 + 105/280 = 273/280 - 273/280 simplified gives 39/40
- So, 3/5 + 21/56 = 39/40
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