Add 81/4 and 21/70
1st number: 20 1/4, 2nd number: 21/70
81/4 + 21/70 is 411/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
81/4 = 81 × 35/4 × 35 = 2835/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
21/70 = 21 × 2/70 × 2 = 42/140 - Add the two like fractions:
2835/140 + 42/140 = 2835 + 42/140 = 2877/140 - 2877/140 simplified gives 411/20
- So, 81/4 + 21/70 = 411/20
In mixed form: 2011/20
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