Add 21/15 and 45/80
1st number: 1 6/15, 2nd number: 45/80
21/15 + 45/80 is 157/80.
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,
45/80 = 45 × 3/80 × 3 = 135/240 - Add the two like fractions:
336/240 + 135/240 = 336 + 135/240 = 471/240 - 471/240 simplified gives 157/80
- So, 21/15 + 45/80 = 157/80
In mixed form: 177/80
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