Add 18/20 and 21/64
18/20 + 21/64 is 393/320.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 64 is 320
Next, find the equivalent fraction of both fractional numbers with denominator 320 - For the 1st fraction, since 20 × 16 = 320,
18/20 = 18 × 16/20 × 16 = 288/320 - Likewise, for the 2nd fraction, since 64 × 5 = 320,
21/64 = 21 × 5/64 × 5 = 105/320 - Add the two like fractions:
288/320 + 105/320 = 288 + 105/320 = 393/320 - So, 18/20 + 21/64 = 393/320
In mixed form: 173/320
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