Don’t lose your progress!

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Up to 90+ points GMAT score improvement guarantee

The best guarantee you’ll find

Our Premium and Ultimate plans guarantee up to 90+ points score increase or your money back.

Master each section of the test

Comprehensive GMAT prep

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Schedule-free studying

Learn on the go

Study whenever and wherever you want with our iOS and Android mobile apps.

The most effective way to study

Personalized GMAT prep, just for you!

Adaptive learning technology focuses on your academic weaknesses.

Plugging In: Invisible Plugging In - Fractions

Michael and Mike earn the same daily wage. Michael worked for 20 days in January, and Mike worked for 25 days. In February, Michael worked for 18 days, and Mike worked for 23 days. In March, each of them worked for four more days than they did the month before that. Michael's total earnings from January to March is what fraction of Mike's earnings?
Incorrect. [[snippet]]
Incorrect. [[snippet]]
Correct. [[snippet]] __Plug In__ an easy number for Michael and Mike's daily wage (such as $1) or disregard because they earn the same amount per day. Michael earned $60, >$$20 + 18 + (18 + 4)$$, in three months and Mike earned $75, >$$25 + 23 + (23 + 4)$$, in the same period of time. Hence, Michael's earnings is $$\frac{4}{5}$$, or $$\frac{60}{75}$$, of Mike's earnings.
Incorrect. [[snippet]]
Incorrect. [[snippet]]
$$\frac{1}{3}$$
$$\frac{1}{2}$$
$$\frac{4}{5}$$
$$1$$
$$\frac{3}{2}$$