Add 1/21 and 90/36
1st number: 1/21, 2nd number: 2 18/36
1/21 + 90/36 is 107/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 36 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 21 × 12 = 252,
1/21 = 1 × 12/21 × 12 = 12/252 - Likewise, for the 2nd fraction, since 36 × 7 = 252,
90/36 = 90 × 7/36 × 7 = 630/252 - Add the two like fractions:
12/252 + 630/252 = 12 + 630/252 = 642/252 - 642/252 simplified gives 107/42
- So, 1/21 + 90/36 = 107/42
In mixed form: 223/42
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