Add 21/30 and 45/80
21/30 + 45/80 is 101/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 30 × 8 = 240,
21/30 = 21 × 8/30 × 8 = 168/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
45/80 = 45 × 3/80 × 3 = 135/240 - Add the two like fractions:
168/240 + 135/240 = 168 + 135/240 = 303/240 - 303/240 simplified gives 101/80
- So, 21/30 + 45/80 = 101/80
In mixed form: 121/80
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