Add 21/8 and 84/90
1st number: 2 5/8, 2nd number: 84/90
21/8 + 84/90 is 427/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 90 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 8 × 45 = 360,
21/8 = 21 × 45/8 × 45 = 945/360 - Likewise, for the 2nd fraction, since 90 × 4 = 360,
84/90 = 84 × 4/90 × 4 = 336/360 - Add the two like fractions:
945/360 + 336/360 = 945 + 336/360 = 1281/360 - 1281/360 simplified gives 427/120
- So, 21/8 + 84/90 = 427/120
In mixed form: 367/120
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