Subtract 42/45 from 54/40, Solve 1 14/40

Subtract 42/45 from 54/40

1^st number: 1 14/40, 2^nd number: 42/45

54/40 - 42/45 is 5/12.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 45 is 360

Next, find the equivalent fraction of both fractional numbers with denominator 360
For the 1st fraction, since 40 × 9 = 360,
54/40 = 54 × 9/40 × 9 = 486/360
Likewise, for the 2nd fraction, since 45 × 8 = 360,
42/45 = 42 × 8/45 × 8 = 336/360
Subtract the two like fractions:
486/360 - 336/360 = 486 - 336/360 = 150/360
After reducing the fraction, the answer is 5/12

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