Add 1/84 and 70/45
1st number: 1/84, 2nd number: 1 25/45
1/84 + 70/45 is 395/252.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 45 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
1/84 = 1 × 15/84 × 15 = 15/1260 - Likewise, for the 2nd fraction, since 45 × 28 = 1260,
70/45 = 70 × 28/45 × 28 = 1960/1260 - Add the two like fractions:
15/1260 + 1960/1260 = 15 + 1960/1260 = 1975/1260 - 1975/1260 simplified gives 395/252
- So, 1/84 + 70/45 = 395/252
In mixed form: 1143/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84+70/45 1/84+70/90 3/84+70/45 5/84+70/45 7/84+70/45