Subtract 21/80 from 42/63
42/63 - 21/80 is 97/240.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 80 is 5040
Next, find the equivalent fraction of both fractional numbers with denominator 5040 - For the 1st fraction, since 63 × 80 = 5040,
42/63 = 42 × 80/63 × 80 = 3360/5040 - Likewise, for the 2nd fraction, since 80 × 63 = 5040,
21/80 = 21 × 63/80 × 63 = 1323/5040 - Subtract the two like fractions:
3360/5040 - 1323/5040 = 3360 - 1323/5040 = 2037/5040 - After reducing the fraction, the answer is 97/240
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