Subtract 2/40 from 50/21, Solve 2 8/21

Subtract 2/40 from 50/21

1^st number: 2 8/21, 2^nd number: 2/40

50/21 - 2/40 is 979/420.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 21 × 40 = 840,
50/21 = 50 × 40/21 × 40 = 2000/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
2/40 = 2 × 21/40 × 21 = 42/840
Subtract the two like fractions:
2000/840 - 42/840 = 2000 - 42/840 = 1958/840
After reducing the fraction, the answer is 979/420
In mixed form: 2139/420

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