Add 28/72 and 45/75
28/72 + 45/75 is 89/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 75 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 72 × 25 = 1800,
28/72 = 28 × 25/72 × 25 = 700/1800 - Likewise, for the 2nd fraction, since 75 × 24 = 1800,
45/75 = 45 × 24/75 × 24 = 1080/1800 - Add the two like fractions:
700/1800 + 1080/1800 = 700 + 1080/1800 = 1780/1800 - 1780/1800 simplified gives 89/90
- So, 28/72 + 45/75 = 89/90
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