Add 60/20 and 90/21
1st number: 3 0/20, 2nd number: 4 6/21
60/20 + 90/21 is 51/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
60/20 = 60 × 21/20 × 21 = 1260/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
90/21 = 90 × 20/21 × 20 = 1800/420 - Add the two like fractions:
1260/420 + 1800/420 = 1260 + 1800/420 = 3060/420 - 3060/420 simplified gives 51/7
- So, 60/20 + 90/21 = 51/7
In mixed form: 72/7
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