Subtract 3/84 from 98/20, Solve 4 18/20

Subtract 3/84 from 98/20

1^st number: 4 18/20, 2^nd number: 3/84

98/20 - 3/84 is 681/140.

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,
98/20 = 98 × 21/20 × 21 = 2058/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
3/84 = 3 × 5/84 × 5 = 15/420
Subtract the two like fractions:
2058/420 - 15/420 = 2058 - 15/420 = 2043/420
After reducing the fraction, the answer is 681/140
In mixed form: 4121/140

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