Subtract 21/80 from 7/9
7/9 - 21/80 is 371/720.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 80 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 9 × 80 = 720,
7/9 = 7 × 80/9 × 80 = 560/720 - Likewise, for the 2nd fraction, since 80 × 9 = 720,
21/80 = 21 × 9/80 × 9 = 189/720 - Subtract the two like fractions:
560/720 - 189/720 = 560 - 189/720 = 371/720
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