Add 70/72 and 18/21
70/72 + 18/21 is 461/252.
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,
70/72 = 70 × 7/72 × 7 = 490/504 - Likewise, for the 2nd fraction, since 21 × 24 = 504,
18/21 = 18 × 24/21 × 24 = 432/504 - Add the two like fractions:
490/504 + 432/504 = 490 + 432/504 = 922/504 - 922/504 simplified gives 461/252
- So, 70/72 + 18/21 = 461/252
In mixed form: 1209/252
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