Add 20/21 and 45/60
20/21 + 45/60 is 143/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
20/21 = 20 × 20/21 × 20 = 400/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
45/60 = 45 × 7/60 × 7 = 315/420 - Add the two like fractions:
400/420 + 315/420 = 400 + 315/420 = 715/420 - 715/420 simplified gives 143/84
- So, 20/21 + 45/60 = 143/84
In mixed form: 159/84
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