Add 25/40 and 21/28
25/40 + 21/28 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
25/40 = 25 × 7/40 × 7 = 175/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
21/28 = 21 × 10/28 × 10 = 210/280 - Add the two like fractions:
175/280 + 210/280 = 175 + 210/280 = 385/280 - 385/280 simplified gives 11/8
- So, 25/40 + 21/28 = 11/8
In mixed form: 13/8
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