Subtract 81/60 from 40/21
1st number: 1 19/21, 2nd number: 1 21/60
40/21 - 81/60 is 233/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
40/21 = 40 × 20/21 × 20 = 800/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
81/60 = 81 × 7/60 × 7 = 567/420 - Subtract the two like fractions:
800/420 - 567/420 = 800 - 567/420 = 233/420
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