Add 21/15 and 90/80
1st number: 1 6/15, 2nd number: 1 10/80
21/15 + 90/80 is 101/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
21/15 = 21 × 16/15 × 16 = 336/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
90/80 = 90 × 3/80 × 3 = 270/240 - Add the two like fractions:
336/240 + 270/240 = 336 + 270/240 = 606/240 - 606/240 simplified gives 101/40
- So, 21/15 + 90/80 = 101/40
In mixed form: 221/40
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