Add 21/70 and 90/24
1st number: 21/70, 2nd number: 3 18/24
21/70 + 90/24 is 81/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 24 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 70 × 12 = 840,
21/70 = 21 × 12/70 × 12 = 252/840 - Likewise, for the 2nd fraction, since 24 × 35 = 840,
90/24 = 90 × 35/24 × 35 = 3150/840 - Add the two like fractions:
252/840 + 3150/840 = 252 + 3150/840 = 3402/840 - 3402/840 simplified gives 81/20
- So, 21/70 + 90/24 = 81/20
In mixed form: 41/20
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