Subtract 18/84 from 25/20, Solve 1 5/20

Subtract 18/84 from 25/20

1^st number: 1 5/20, 2^nd number: 18/84

25/20 - 18/84 is 29/28.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 20 × 21 = 420,
25/20 = 25 × 21/20 × 21 = 525/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
18/84 = 18 × 5/84 × 5 = 90/420
Subtract the two like fractions:
525/420 - 90/420 = 525 - 90/420 = 435/420
After reducing the fraction, the answer is 29/28
In mixed form: 11/28

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