Subtract 5/72 from 20/45
20/45 - 5/72 is 3/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 45 × 8 = 360,
20/45 = 20 × 8/45 × 8 = 160/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
5/72 = 5 × 5/72 × 5 = 25/360 - Subtract the two like fractions:
160/360 - 25/360 = 160 - 25/360 = 135/360 - After reducing the fraction, the answer is 3/8
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