Add 45/72 and 20/45
45/72 + 20/45 is 77/72.
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,
45/72 = 45 × 5/72 × 5 = 225/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
20/45 = 20 × 8/45 × 8 = 160/360 - Add the two like fractions:
225/360 + 160/360 = 225 + 160/360 = 385/360 - 385/360 simplified gives 77/72
- So, 45/72 + 20/45 = 77/72
In mixed form: 15/72
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