Add 21/72 and 7/15
21/72 + 7/15 is 91/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 15 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 15 × 24 = 360,
7/15 = 7 × 24/15 × 24 = 168/360 - Add the two like fractions:
105/360 + 168/360 = 105 + 168/360 = 273/360 - 273/360 simplified gives 91/120
- So, 21/72 + 7/15 = 91/120
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