Add 21/72 and 28/40
21/72 + 28/40 is 119/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 40 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
21/72 = 21 × 5/72 × 5 = 105/360 - Likewise, for the 2nd fraction, since 40 × 9 = 360,
28/40 = 28 × 9/40 × 9 = 252/360 - Add the two like fractions:
105/360 + 252/360 = 105 + 252/360 = 357/360 - 357/360 simplified gives 119/120
- So, 21/72 + 28/40 = 119/120
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