Subtract 18/20 from 48/21, Solve 2 6/21

Subtract 18/20 from 48/21

1^st number: 2 6/21, 2^nd number: 18/20

48/21 - 18/20 is 97/70.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 21 × 20 = 420,
48/21 = 48 × 20/21 × 20 = 960/420
Likewise, for the 2nd fraction, since 20 × 21 = 420,
18/20 = 18 × 21/20 × 21 = 378/420
Subtract the two like fractions:
960/420 - 378/420 = 960 - 378/420 = 582/420
After reducing the fraction, the answer is 97/70
In mixed form: 127/70

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