Add 21/28 and 45/75
21/28 + 45/75 is 27/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 75 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 28 × 75 = 2100,
21/28 = 21 × 75/28 × 75 = 1575/2100 - Likewise, for the 2nd fraction, since 75 × 28 = 2100,
45/75 = 45 × 28/75 × 28 = 1260/2100 - Add the two like fractions:
1575/2100 + 1260/2100 = 1575 + 1260/2100 = 2835/2100 - 2835/2100 simplified gives 27/20
- So, 21/28 + 45/75 = 27/20
In mixed form: 17/20
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