Add 18/20 and 21/25
18/20 + 21/25 is 87/50.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 25 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 20 × 5 = 100,
18/20 = 18 × 5/20 × 5 = 90/100 - Likewise, for the 2nd fraction, since 25 × 4 = 100,
21/25 = 21 × 4/25 × 4 = 84/100 - Add the two like fractions:
90/100 + 84/100 = 90 + 84/100 = 174/100 - 174/100 simplified gives 87/50
- So, 18/20 + 21/25 = 87/50
In mixed form: 137/50
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