Add 16/21 and 5/20
16/21 + 5/20 is 85/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
16/21 = 16 × 20/21 × 20 = 320/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
5/20 = 5 × 21/20 × 21 = 105/420 - Add the two like fractions:
320/420 + 105/420 = 320 + 105/420 = 425/420 - 425/420 simplified gives 85/84
- So, 16/21 + 5/20 = 85/84
In mixed form: 11/84
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