Add 21/45 and 28/40
21/45 + 28/40 is 7/6.
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,
21/45 = 21 × 8/45 × 8 = 168/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Add the two like fractions:
168/360 + 252/360 = 168 + 252/360 = 420/360 - 420/360 simplified gives 7/6
- So, 21/45 + 28/40 = 7/6
In mixed form: 11/6
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