Add 10/80 and 40/42
10/80 + 40/42 is 181/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 42 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
10/80 = 10 × 21/80 × 21 = 210/1680 - Likewise, for the 2nd fraction, since 42 × 40 = 1680,
40/42 = 40 × 40/42 × 40 = 1600/1680 - Add the two like fractions:
210/1680 + 1600/1680 = 210 + 1600/1680 = 1810/1680 - 1810/1680 simplified gives 181/168
- So, 10/80 + 40/42 = 181/168
In mixed form: 113/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/80+40/42 10/80+80/42 10/80+40/84 30/80+40/42 50/80+40/42 70/80+40/42