Add 21/80 and 63/45
1st number: 21/80, 2nd number: 1 18/45
21/80 + 63/45 is 133/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
63/45 = 63 × 16/45 × 16 = 1008/720 - Add the two like fractions:
189/720 + 1008/720 = 189 + 1008/720 = 1197/720 - 1197/720 simplified gives 133/80
- So, 21/80 + 63/45 = 133/80
In mixed form: 153/80
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