Add 21/72 and 8/80
21/72 + 8/80 is 47/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 72 × 10 = 720,
21/72 = 21 × 10/72 × 10 = 210/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
8/80 = 8 × 9/80 × 9 = 72/720 - Add the two like fractions:
210/720 + 72/720 = 210 + 72/720 = 282/720 - 282/720 simplified gives 47/120
- So, 21/72 + 8/80 = 47/120
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