Subtract 49/40 from 56/84, Solve 56/84

Subtract 49/40 from 56/84

1^st number: 56/84, 2^nd number: 1 9/40

56/84 - 49/40 is -67/120.

Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840

Next, find the equivalent fraction of both fractional numbers with denominator 840
For the 1st fraction, since 84 × 10 = 840,
56/84 = 56 × 10/84 × 10 = 560/840
Likewise, for the 2nd fraction, since 40 × 21 = 840,
49/40 = 49 × 21/40 × 21 = 1029/840
Subtract the two like fractions:
560/840 - 1029/840 = 560 - 1029/840 = -469/840
After reducing the fraction, the answer is -67/120

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