Add 45/21 and 20/72
1st number: 2 3/21, 2nd number: 20/72
45/21 + 20/72 is 305/126.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
45/21 = 45 × 24/21 × 24 = 1080/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
20/72 = 20 × 7/72 × 7 = 140/504 - Add the two like fractions:
1080/504 + 140/504 = 1080 + 140/504 = 1220/504 - 1220/504 simplified gives 305/126
- So, 45/21 + 20/72 = 305/126
In mixed form: 253/126
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