Add 15/25 and 21/56
15/25 + 21/56 is 39/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 56 is 1400
Next, find the equivalent fraction of both fractional numbers with denominator 1400 - For the 1st fraction, since 25 × 56 = 1400,
15/25 = 15 × 56/25 × 56 = 840/1400 - Likewise, for the 2nd fraction, since 56 × 25 = 1400,
21/56 = 21 × 25/56 × 25 = 525/1400 - Add the two like fractions:
840/1400 + 525/1400 = 840 + 525/1400 = 1365/1400 - 1365/1400 simplified gives 39/40
- So, 15/25 + 21/56 = 39/40
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