## 4 More FAQs about Percentages

How do you quickly calculate 25 percent of a number? Or 33 percent of a number? And how can you quickly calculate percentage increases?

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How do you quickly calculate 25 percent of a number? Or 33 percent of a number? And how can you quickly calculate percentage increases?

June 28, 2017 — Math Dude Jason Marshall

Physicists have exploited the laws of quantum mechanics to send information without transmitting a signal. But have they, really?

June 27, 2017 — Joshua Roebke

A team of physicists has revealed why rolling suitcases start rocking from wheel to wheel—and how to avoid that frustrating phenomenon. Christopher Intagliata reports.

June 21, 2017 — Christopher Intagliata

Feds consider “conservation triage” that would let some animals go extinct to save funds for protecting others

June 19, 2017

Mathematics is increasingly integral to biology as more detailed experiments in recent years have led to a huge influx in biological data

June 15, 2017 — Christian Yates and The Conversation UK

The Great Stalacpipe Organ operates by rhythmically striking 37 different stalactites scattered across the 3.5-acre cave

June 9, 2017 — Julia Griffin, Kristin Hugo and PBS NewsHour

With algorithms in hand, scientists try to make U.S. elections more representative

June 7, 2017 — Carrie Arnold and Nature

What does it really mean for a satellite to orbit the Earth? What’s the math behind it? And what’s the math behind the rockets that get those satellites into orbit? Keep on reading to find out!

June 7, 2017 — Math Dude Jason Marshall

Nadine Gaab, an associate professor of pediatrics at Boston Children’s Hospital and Harvard Medical School, and Jennifer Zuk, a doctoral student at Harvard University, answer:

May 15, 2017 — Nadine Gaab and Jennifer Zuk

When tiny particles of space debris slam into satellites, the collision could cause the emission of hardware-frying radiation. Christopher Intagliata reports.

May 11, 2017 — Christopher Intagliata

Researchers have trotted out data that show a combination of whipping and stomping forces is what causes laces to unravel without warning. Karen Hopkin reports.

April 12, 2017 — Karen Hopkin

How large was the crowd at the recent U.S. presidential inauguration? Or the inauguration eight years ago? Keep on reading to find out how crowd sizes are estimated

April 12, 2017 — Math Dude Jason Marshall

Mathematician Eugenia Cheng will describe how cooking can offer insight into abstract math

April 5, 2017 — Andrea Marks

Immersive experience set to become accessible to all

March 22, 2017 — Davide Castelvecchi and Nature

Yves Meyer wins the Abel Prize for development of a theory with applications ranging from watching movies to detecting gravitational waves

March 21, 2017 — Davide Castelvecchi and Nature

Researchers used ancient climate cycles to confirm the solar system’s chaotic planetary orbits. An Earth–Mars collision is one distant outcome. Julia Rosen reports.

March 20, 2017 — Julia Rosen

A project that measures up

March 16, 2017 — Science Buddies and Sabine de Brabandere

For centuries mathematicians tried to solve problems by adding new values to the usual numbers. Now they’re investigating the unintended consequences of that tinkering

March 15, 2017 — Kevin Hartnett and Quanta Magazine

For thousands of years people have struggled to pin down pi. Watch how mathematicians from Archimedes on have wrapped their heads around the math of circles.

March 14, 2017 — Shelley Sandiford and Lydia Chain

Are we alone in the universe? If so, why? If not, where is everybody? Thankfully, math can help us with these astronomically profound questions

March 11, 2017 — Math Dude Jason Marshall

Biology. Identity. Equality.