Subtract 28/7 from 20/80
1st number: 20/80, 2nd number: 4 0/7
20/80 - 28/7 is -15/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 7 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
20/80 = 20 × 7/80 × 7 = 140/560 - Likewise, for the 2nd fraction, since 7 × 80 = 560,
28/7 = 28 × 80/7 × 80 = 2240/560 - Subtract the two like fractions:
140/560 - 2240/560 = 140 - 2240/560 = -2100/560 - After reducing the fraction, the answer is -15/4
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