Add 21/45 and 28/48
21/45 + 28/48 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 48 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
21/45 = 21 × 16/45 × 16 = 336/720 - Likewise, for the 2nd fraction, since 48 × 15 = 720,
28/48 = 28 × 15/48 × 15 = 420/720 - Add the two like fractions:
336/720 + 420/720 = 336 + 420/720 = 756/720 - 756/720 simplified gives 21/20
- So, 21/45 + 28/48 = 21/20
In mixed form: 11/20
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