Add 7/45 and 70/84
7/45 + 70/84 is 89/90.
Steps for adding fractions
- 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,
7/45 = 7 × 28/45 × 28 = 196/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
70/84 = 70 × 15/84 × 15 = 1050/1260 - Add the two like fractions:
196/1260 + 1050/1260 = 196 + 1050/1260 = 1246/1260 - 1246/1260 simplified gives 89/90
- So, 7/45 + 70/84 = 89/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/45+70/84 7/90+70/84 21/45+70/84 35/45+70/84 49/45+70/84