Subtract 20/84 from 70/45, Solve 1 25/45

Subtract 20/84 from 70/45

1^st number: 1 25/45, 2^nd number: 20/84

70/45 - 20/84 is 83/63.

Find the least common denominator or LCM of the two denominators:
LCM of 45 and 84 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 45 × 28 = 1260,
70/45 = 70 × 28/45 × 28 = 1960/1260
Likewise, for the 2nd fraction, since 84 × 15 = 1260,
20/84 = 20 × 15/84 × 15 = 300/1260
Subtract the two like fractions:
1960/1260 - 300/1260 = 1960 - 300/1260 = 1660/1260
After reducing the fraction, the answer is 83/63
In mixed form: 120/63

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