Subtract 20/72 from 4/5
4/5 - 20/72 is 47/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
4/5 = 4 × 72/5 × 72 = 288/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
20/72 = 20 × 5/72 × 5 = 100/360 - Subtract the two like fractions:
288/360 - 100/360 = 288 - 100/360 = 188/360 - After reducing the fraction, the answer is 47/90
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