Add 84/45 and 21/40
1st number: 1 39/45, 2nd number: 21/40
84/45 + 21/40 is 287/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
84/45 = 84 × 8/45 × 8 = 672/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
21/40 = 21 × 9/40 × 9 = 189/360 - Add the two like fractions:
672/360 + 189/360 = 672 + 189/360 = 861/360 - 861/360 simplified gives 287/120
- So, 84/45 + 21/40 = 287/120
In mixed form: 247/120
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