Subtract 9/49 from 81/40, Solve 2 1/40

Subtract 9/49 from 81/40

1^st number: 2 1/40, 2^nd number: 9/49

81/40 - 9/49 is 3609/1960.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 49 is 1960

Next, find the equivalent fraction of both fractional numbers with denominator 1960
For the 1st fraction, since 40 × 49 = 1960,
81/40 = 81 × 49/40 × 49 = 3969/1960
Likewise, for the 2nd fraction, since 49 × 40 = 1960,
9/49 = 9 × 40/49 × 40 = 360/1960
Subtract the two like fractions:
3969/1960 - 360/1960 = 3969 - 360/1960 = 3609/1960
In mixed form: 11649/1960

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