Subtract 70/45 from 14/21, Solve 14/21

Subtract 70/45 from 14/21

1^st number: 14/21, 2^nd number: 1 25/45

14/21 - 70/45 is -8/9.

Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315

Next, find the equivalent fraction of both fractional numbers with denominator 315
For the 1st fraction, since 21 × 15 = 315,
14/21 = 14 × 15/21 × 15 = 210/315
Likewise, for the 2nd fraction, since 45 × 7 = 315,
70/45 = 70 × 7/45 × 7 = 490/315
Subtract the two like fractions:
210/315 - 490/315 = 210 - 490/315 = -280/315
After reducing the fraction, the answer is -8/9

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