Add 21/45 and 9/80
21/45 + 9/80 is 139/240.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 45 × 16 = 720,
21/45 = 21 × 16/45 × 16 = 336/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
9/80 = 9 × 9/80 × 9 = 81/720 - Add the two like fractions:
336/720 + 81/720 = 336 + 81/720 = 417/720 - 417/720 simplified gives 139/240
- So, 21/45 + 9/80 = 139/240
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