Subtract 9/28 from 72/80
72/80 - 9/28 is 81/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 28 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560 - Likewise, for the 2nd fraction, since 28 × 20 = 560,
9/28 = 9 × 20/28 × 20 = 180/560 - Subtract the two like fractions:
504/560 - 180/560 = 504 - 180/560 = 324/560 - After reducing the fraction, the answer is 81/140
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