Add 20/25 and 18/72
20/25 + 18/72 is 21/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 72 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 25 × 72 = 1800,
20/25 = 20 × 72/25 × 72 = 1440/1800 - Likewise, for the 2nd fraction, since 72 × 25 = 1800,
18/72 = 18 × 25/72 × 25 = 450/1800 - Add the two like fractions:
1440/1800 + 450/1800 = 1440 + 450/1800 = 1890/1800 - 1890/1800 simplified gives 21/20
- So, 20/25 + 18/72 = 21/20
In mixed form: 11/20
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