Add 45/72 and 42/56
45/72 + 42/56 is 11/8.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 56 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
45/72 = 45 × 7/72 × 7 = 315/504 - Likewise, for the 2nd fraction, since 56 × 9 = 504,
42/56 = 42 × 9/56 × 9 = 378/504 - Add the two like fractions:
315/504 + 378/504 = 315 + 378/504 = 693/504 - 693/504 simplified gives 11/8
- So, 45/72 + 42/56 = 11/8
In mixed form: 13/8
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