Add 4/72 and 1/21
4/72 + 1/21 is 13/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 21 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
4/72 = 4 × 7/72 × 7 = 28/504 - Likewise, for the 2nd fraction, since 21 × 24 = 504,
1/21 = 1 × 24/21 × 24 = 24/504 - Add the two like fractions:
28/504 + 24/504 = 28 + 24/504 = 52/504 - 52/504 simplified gives 13/126
- So, 4/72 + 1/21 = 13/126
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