Add 28/72 and 18/45
28/72 + 18/45 is 71/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
28/72 = 28 × 5/72 × 5 = 140/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
18/45 = 18 × 8/45 × 8 = 144/360 - Add the two like fractions:
140/360 + 144/360 = 140 + 144/360 = 284/360 - 284/360 simplified gives 71/90
- So, 28/72 + 18/45 = 71/90
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